contrib/llvm/tools/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp

   1 //===-- SymbolFileDWARF.cpp ------------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "SymbolFileDWARF.h"
  11
  12 // Other libraries and framework includes
  13 #include "clang/AST/ASTConsumer.h"
  14 #include "clang/AST/ASTContext.h"
  15 #include "clang/AST/Decl.h"
  16 #include "clang/AST/DeclGroup.h"
  17 #include "clang/AST/DeclObjC.h"
  18 #include "clang/AST/DeclTemplate.h"
  19 #include "clang/Basic/Builtins.h"
  20 #include "clang/Basic/IdentifierTable.h"
  21 #include "clang/Basic/LangOptions.h"
  22 #include "clang/Basic/SourceManager.h"
  23 #include "clang/Basic/TargetInfo.h"
  24 #include "clang/Basic/Specifiers.h"
  25 #include "clang/Sema/DeclSpec.h"
  26
  27 #include "llvm/Support/Casting.h"
  28
  29 #include "lldb/Core/ArchSpec.h"
  30 #include "lldb/Core/Module.h"
  31 #include "lldb/Core/ModuleList.h"
  32 #include "lldb/Core/ModuleSpec.h"
  33 #include "lldb/Core/PluginManager.h"
  34 #include "lldb/Core/RegularExpression.h"
  35 #include "lldb/Core/Scalar.h"
  36 #include "lldb/Core/Section.h"
  37 #include "lldb/Core/StreamFile.h"
  38 #include "lldb/Core/StreamString.h"
  39 #include "lldb/Core/Timer.h"
  40 #include "lldb/Core/Value.h"
  41
  42 #include "lldb/Expression/ClangModulesDeclVendor.h"
  43
  44 #include "lldb/Host/Host.h"
  45
  46 #include "lldb/Symbol/Block.h"
  47 #include "lldb/Symbol/ClangExternalASTSourceCallbacks.h"
  48 #include "lldb/Symbol/CompileUnit.h"
  49 #include "lldb/Symbol/LineTable.h"
  50 #include "lldb/Symbol/ObjectFile.h"
  51 #include "lldb/Symbol/SymbolVendor.h"
  52 #include "lldb/Symbol/VariableList.h"
  53
  54 #include "lldb/Target/ObjCLanguageRuntime.h"
  55 #include "lldb/Target/CPPLanguageRuntime.h"
  56
  57 #include "DWARFCompileUnit.h"
  58 #include "DWARFDebugAbbrev.h"
  59 #include "DWARFDebugAranges.h"
  60 #include "DWARFDebugInfo.h"
  61 #include "DWARFDebugInfoEntry.h"
  62 #include "DWARFDebugLine.h"
  63 #include "DWARFDebugPubnames.h"
  64 #include "DWARFDebugRanges.h"
  65 #include "DWARFDeclContext.h"
  66 #include "DWARFDIECollection.h"
  67 #include "DWARFFormValue.h"
  68 #include "DWARFLocationList.h"
  69 #include "LogChannelDWARF.h"
  70 #include "SymbolFileDWARFDebugMap.h"
  71
  72 #include <map>
  73
  74 #include <ctype.h>
  75 #include <string.h>
  76
  77 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN
  78
  79 #ifdef ENABLE_DEBUG_PRINTF
  80 #include <stdio.h>
  81 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
  82 #else
  83 #define DEBUG_PRINTF(fmt, ...)
  84 #endif
  85
  86 #define DIE_IS_BEING_PARSED ((lldb_private::Type*)1)
  87
  88 using namespace lldb;
  89 using namespace lldb_private;
  90
  91 //static inline bool
  92 //child_requires_parent_class_union_or_struct_to_be_completed (dw_tag_t tag)
  93 //{
  94 //    switch (tag)
  95 //    {
  96 //    default:
  97 //        break;
  98 //    case DW_TAG_subprogram:
  99 //    case DW_TAG_inlined_subroutine:
 100 //    case DW_TAG_class_type:
 101 //    case DW_TAG_structure_type:
 102 //    case DW_TAG_union_type:
 103 //        return true;
 104 //    }
 105 //    return false;
 106 //}
 107 //
 108 static AccessType
 109 DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility)
 110 {
 111     switch (dwarf_accessibility)
 112     {
 113         case DW_ACCESS_public:      return eAccessPublic;
 114         case DW_ACCESS_private:     return eAccessPrivate;
 115         case DW_ACCESS_protected:   return eAccessProtected;
 116         default:                    break;
 117     }
 118     return eAccessNone;
 119 }
 120
 121 static const char*
 122 removeHostnameFromPathname(const char* path_from_dwarf)
 123 {
 124     if (!path_from_dwarf || !path_from_dwarf[0])
 125     {
 126         return path_from_dwarf;
 127     }
 128
 129     const char *colon_pos = strchr(path_from_dwarf, ':');
 130     if (!colon_pos)
 131     {
 132         return path_from_dwarf;
 133     }
 134
 135     // check whether we have a windows path, and so the first character
 136     // is a drive-letter not a hostname.
 137     if (
 138         colon_pos == path_from_dwarf + 1 &&
 139         isalpha(*path_from_dwarf) &&
 140         strlen(path_from_dwarf) > 2 &&
 141         '\\' == path_from_dwarf[2])
 142     {
 143         return path_from_dwarf;
 144     }
 145
 146     return colon_pos + 1;
 147 }
 148
 149 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
 150
 151 class DIEStack
 152 {
 153 public:
 154
 155     void Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
 156     {
 157         m_dies.push_back (DIEInfo(cu, die));
 158     }
 159
 160
 161     void LogDIEs (Log *log, SymbolFileDWARF *dwarf)
 162     {
 163         StreamString log_strm;
 164         const size_t n = m_dies.size();
 165         log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n);
 166         for (size_t i=0; i<n; i++)
 167         {
 168             DWARFCompileUnit *cu = m_dies[i].cu;
 169             const DWARFDebugInfoEntry *die = m_dies[i].die;
 170             std::string qualified_name;
 171             die->GetQualifiedName(dwarf, cu, qualified_name);
 172             log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n",
 173                              (uint64_t)i,
 174                              die->GetOffset(),
 175                              DW_TAG_value_to_name(die->Tag()),
 176                              qualified_name.c_str());
 177         }
 178         log->PutCString(log_strm.GetData());
 179     }
 180     void Pop ()
 181     {
 182         m_dies.pop_back();
 183     }
 184
 185     class ScopedPopper
 186     {
 187     public:
 188         ScopedPopper (DIEStack &die_stack) :
 189             m_die_stack (die_stack),
 190             m_valid (false)
 191         {
 192         }
 193
 194         void
 195         Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
 196         {
 197             m_valid = true;
 198             m_die_stack.Push (cu, die);
 199         }
 200
 201         ~ScopedPopper ()
 202         {
 203             if (m_valid)
 204                 m_die_stack.Pop();
 205         }
 206
 207
 208
 209     protected:
 210         DIEStack &m_die_stack;
 211         bool m_valid;
 212     };
 213
 214 protected:
 215     struct DIEInfo {
 216         DIEInfo (DWARFCompileUnit *c, const DWARFDebugInfoEntry *d) :
 217             cu(c),
 218             die(d)
 219         {
 220         }
 221         DWARFCompileUnit *cu;
 222         const DWARFDebugInfoEntry *die;
 223     };
 224     typedef std::vector<DIEInfo> Stack;
 225     Stack m_dies;
 226 };
 227 #endif
 228
 229 void
 230 SymbolFileDWARF::Initialize()
 231 {
 232     LogChannelDWARF::Initialize();
 233     PluginManager::RegisterPlugin (GetPluginNameStatic(),
 234                                    GetPluginDescriptionStatic(),
 235                                    CreateInstance);
 236 }
 237
 238 void
 239 SymbolFileDWARF::Terminate()
 240 {
 241     PluginManager::UnregisterPlugin (CreateInstance);
 242     LogChannelDWARF::Initialize();
 243 }
 244
 245
 246 lldb_private::ConstString
 247 SymbolFileDWARF::GetPluginNameStatic()
 248 {
 249     static ConstString g_name("dwarf");
 250     return g_name;
 251 }
 252
 253 const char *
 254 SymbolFileDWARF::GetPluginDescriptionStatic()
 255 {
 256     return "DWARF and DWARF3 debug symbol file reader.";
 257 }
 258
 259
 260 SymbolFile*
 261 SymbolFileDWARF::CreateInstance (ObjectFile* obj_file)
 262 {
 263     return new SymbolFileDWARF(obj_file);
 264 }
 265
 266 TypeList *
 267 SymbolFileDWARF::GetTypeList ()
 268 {
 269     if (GetDebugMapSymfile ())
 270         return m_debug_map_symfile->GetTypeList();
 271     return m_obj_file->GetModule()->GetTypeList();
 272
 273 }
 274 void
 275 SymbolFileDWARF::GetTypes (DWARFCompileUnit* cu,
 276                            const DWARFDebugInfoEntry *die,
 277                            dw_offset_t min_die_offset,
 278                            dw_offset_t max_die_offset,
 279                            uint32_t type_mask,
 280                            TypeSet &type_set)
 281 {
 282     if (cu)
 283     {
 284         if (die)
 285         {
 286             const dw_offset_t die_offset = die->GetOffset();
 287
 288             if (die_offset >= max_die_offset)
 289                 return;
 290
 291             if (die_offset >= min_die_offset)
 292             {
 293                 const dw_tag_t tag = die->Tag();
 294
 295                 bool add_type = false;
 296
 297                 switch (tag)
 298                 {
 299                     case DW_TAG_array_type:         add_type = (type_mask & eTypeClassArray         ) != 0; break;
 300                     case DW_TAG_unspecified_type:
 301                     case DW_TAG_base_type:          add_type = (type_mask & eTypeClassBuiltin       ) != 0; break;
 302                     case DW_TAG_class_type:         add_type = (type_mask & eTypeClassClass         ) != 0; break;
 303                     case DW_TAG_structure_type:     add_type = (type_mask & eTypeClassStruct        ) != 0; break;
 304                     case DW_TAG_union_type:         add_type = (type_mask & eTypeClassUnion         ) != 0; break;
 305                     case DW_TAG_enumeration_type:   add_type = (type_mask & eTypeClassEnumeration   ) != 0; break;
 306                     case DW_TAG_subroutine_type:
 307                     case DW_TAG_subprogram:
 308                     case DW_TAG_inlined_subroutine: add_type = (type_mask & eTypeClassFunction      ) != 0; break;
 309                     case DW_TAG_pointer_type:       add_type = (type_mask & eTypeClassPointer       ) != 0; break;
 310                     case DW_TAG_rvalue_reference_type:
 311                     case DW_TAG_reference_type:     add_type = (type_mask & eTypeClassReference     ) != 0; break;
 312                     case DW_TAG_typedef:            add_type = (type_mask & eTypeClassTypedef       ) != 0; break;
 313                     case DW_TAG_ptr_to_member_type: add_type = (type_mask & eTypeClassMemberPointer ) != 0; break;
 314                 }
 315
 316                 if (add_type)
 317                 {
 318                     const bool assert_not_being_parsed = true;
 319                     Type *type = ResolveTypeUID (cu, die, assert_not_being_parsed);
 320                     if (type)
 321                     {
 322                         if (type_set.find(type) == type_set.end())
 323                             type_set.insert(type);
 324                     }
 325                 }
 326             }
 327
 328             for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
 329                  child_die != NULL;
 330                  child_die = child_die->GetSibling())
 331             {
 332                 GetTypes (cu, child_die, min_die_offset, max_die_offset, type_mask, type_set);
 333             }
 334         }
 335     }
 336 }
 337
 338 size_t
 339 SymbolFileDWARF::GetTypes (SymbolContextScope *sc_scope,
 340                            uint32_t type_mask,
 341                            TypeList &type_list)
 342
 343 {
 344     TypeSet type_set;
 345
 346     CompileUnit *comp_unit = NULL;
 347     DWARFCompileUnit* dwarf_cu = NULL;
 348     if (sc_scope)
 349         comp_unit = sc_scope->CalculateSymbolContextCompileUnit();
 350
 351     if (comp_unit)
 352     {
 353         dwarf_cu = GetDWARFCompileUnit(comp_unit);
 354         if (dwarf_cu == 0)
 355             return 0;
 356         GetTypes (dwarf_cu,
 357                   dwarf_cu->DIE(),
 358                   dwarf_cu->GetOffset(),
 359                   dwarf_cu->GetNextCompileUnitOffset(),
 360                   type_mask,
 361                   type_set);
 362     }
 363     else
 364     {
 365         DWARFDebugInfo* info = DebugInfo();
 366         if (info)
 367         {
 368             const size_t num_cus = info->GetNumCompileUnits();
 369             for (size_t cu_idx=0; cu_idx<num_cus; ++cu_idx)
 370             {
 371                 dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
 372                 if (dwarf_cu)
 373                 {
 374                     GetTypes (dwarf_cu,
 375                               dwarf_cu->DIE(),
 376                               0,
 377                               UINT32_MAX,
 378                               type_mask,
 379                               type_set);
 380                 }
 381             }
 382         }
 383     }
 384 //    if (m_using_apple_tables)
 385 //    {
 386 //        DWARFMappedHash::MemoryTable *apple_types = m_apple_types_ap.get();
 387 //        if (apple_types)
 388 //        {
 389 //            apple_types->ForEach([this, &type_set, apple_types, type_mask](const DWARFMappedHash::DIEInfoArray &die_info_array) -> bool {
 390 //
 391 //                for (auto die_info: die_info_array)
 392 //                {
 393 //                    bool add_type = TagMatchesTypeMask (type_mask, 0);
 394 //                    if (!add_type)
 395 //                    {
 396 //                        dw_tag_t tag = die_info.tag;
 397 //                        if (tag == 0)
 398 //                        {
 399 //                            const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_info.offset, NULL);
 400 //                            tag = die->Tag();
 401 //                        }
 402 //                        add_type = TagMatchesTypeMask (type_mask, tag);
 403 //                    }
 404 //                    if (add_type)
 405 //                    {
 406 //                        Type *type = ResolveTypeUID(die_info.offset);
 407 //
 408 //                        if (type_set.find(type) == type_set.end())
 409 //                            type_set.insert(type);
 410 //                    }
 411 //                }
 412 //                return true; // Keep iterating
 413 //            });
 414 //        }
 415 //    }
 416 //    else
 417 //    {
 418 //        if (!m_indexed)
 419 //            Index ();
 420 //
 421 //        m_type_index.ForEach([this, &type_set, type_mask](const char *name, uint32_t die_offset) -> bool {
 422 //
 423 //            bool add_type = TagMatchesTypeMask (type_mask, 0);
 424 //
 425 //            if (!add_type)
 426 //            {
 427 //                const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_offset, NULL);
 428 //                if (die)
 429 //                {
 430 //                    const dw_tag_t tag = die->Tag();
 431 //                    add_type = TagMatchesTypeMask (type_mask, tag);
 432 //                }
 433 //            }
 434 //
 435 //            if (add_type)
 436 //            {
 437 //                Type *type = ResolveTypeUID(die_offset);
 438 //
 439 //                if (type_set.find(type) == type_set.end())
 440 //                    type_set.insert(type);
 441 //            }
 442 //            return true; // Keep iterating
 443 //        });
 444 //    }
 445
 446     std::set<ClangASTType> clang_type_set;
 447     size_t num_types_added = 0;
 448     for (Type *type : type_set)
 449     {
 450         ClangASTType clang_type = type->GetClangForwardType();
 451         if (clang_type_set.find(clang_type) == clang_type_set.end())
 452         {
 453             clang_type_set.insert(clang_type);
 454             type_list.Insert (type->shared_from_this());
 455             ++num_types_added;
 456         }
 457     }
 458     return num_types_added;
 459 }
 460
 461
 462 //----------------------------------------------------------------------
 463 // Gets the first parent that is a lexical block, function or inlined
 464 // subroutine, or compile unit.
 465 //----------------------------------------------------------------------
 466 static const DWARFDebugInfoEntry *
 467 GetParentSymbolContextDIE(const DWARFDebugInfoEntry *child_die)
 468 {
 469     const DWARFDebugInfoEntry *die;
 470     for (die = child_die->GetParent(); die != NULL; die = die->GetParent())
 471     {
 472         dw_tag_t tag = die->Tag();
 473
 474         switch (tag)
 475         {
 476         case DW_TAG_compile_unit:
 477         case DW_TAG_subprogram:
 478         case DW_TAG_inlined_subroutine:
 479         case DW_TAG_lexical_block:
 480             return die;
 481         }
 482     }
 483     return NULL;
 484 }
 485
 486
 487 SymbolFileDWARF::SymbolFileDWARF(ObjectFile* objfile) :
 488     SymbolFile (objfile),
 489     UserID (0),  // Used by SymbolFileDWARFDebugMap to when this class parses .o files to contain the .o file index/ID
 490     m_debug_map_module_wp (),
 491     m_debug_map_symfile (NULL),
 492     m_clang_tu_decl (NULL),
 493     m_flags(),
 494     m_data_debug_abbrev (),
 495     m_data_debug_aranges (),
 496     m_data_debug_frame (),
 497     m_data_debug_info (),
 498     m_data_debug_line (),
 499     m_data_debug_loc (),
 500     m_data_debug_ranges (),
 501     m_data_debug_str (),
 502     m_data_apple_names (),
 503     m_data_apple_types (),
 504     m_data_apple_namespaces (),
 505     m_abbr(),
 506     m_info(),
 507     m_line(),
 508     m_apple_names_ap (),
 509     m_apple_types_ap (),
 510     m_apple_namespaces_ap (),
 511     m_apple_objc_ap (),
 512     m_function_basename_index(),
 513     m_function_fullname_index(),
 514     m_function_method_index(),
 515     m_function_selector_index(),
 516     m_objc_class_selectors_index(),
 517     m_global_index(),
 518     m_type_index(),
 519     m_namespace_index(),
 520     m_indexed (false),
 521     m_is_external_ast_source (false),
 522     m_using_apple_tables (false),
 523     m_fetched_external_modules (false),
 524     m_supports_DW_AT_APPLE_objc_complete_type (eLazyBoolCalculate),
 525     m_ranges(),
 526     m_unique_ast_type_map ()
 527 {
 528 }
 529
 530 SymbolFileDWARF::~SymbolFileDWARF()
 531 {
 532     if (m_is_external_ast_source)
 533     {
 534         ModuleSP module_sp (m_obj_file->GetModule());
 535         if (module_sp)
 536             module_sp->GetClangASTContext().RemoveExternalSource ();
 537     }
 538 }
 539
 540 static const ConstString &
 541 GetDWARFMachOSegmentName ()
 542 {
 543     static ConstString g_dwarf_section_name ("__DWARF");
 544     return g_dwarf_section_name;
 545 }
 546
 547 UniqueDWARFASTTypeMap &
 548 SymbolFileDWARF::GetUniqueDWARFASTTypeMap ()
 549 {
 550     if (GetDebugMapSymfile ())
 551         return m_debug_map_symfile->GetUniqueDWARFASTTypeMap ();
 552     return m_unique_ast_type_map;
 553 }
 554
 555 ClangASTContext &
 556 SymbolFileDWARF::GetClangASTContext ()
 557 {
 558     if (GetDebugMapSymfile ())
 559         return m_debug_map_symfile->GetClangASTContext ();
 560
 561     ClangASTContext &ast = m_obj_file->GetModule()->GetClangASTContext();
 562     if (!m_is_external_ast_source)
 563     {
 564         m_is_external_ast_source = true;
 565         llvm::IntrusiveRefCntPtr<clang::ExternalASTSource> ast_source_ap (
 566             new ClangExternalASTSourceCallbacks (SymbolFileDWARF::CompleteTagDecl,
 567                                                  SymbolFileDWARF::CompleteObjCInterfaceDecl,
 568                                                  SymbolFileDWARF::FindExternalVisibleDeclsByName,
 569                                                  SymbolFileDWARF::LayoutRecordType,
 570                                                  this));
 571         ast.SetExternalSource (ast_source_ap);
 572     }
 573     return ast;
 574 }
 575
 576 void
 577 SymbolFileDWARF::InitializeObject()
 578 {
 579     // Install our external AST source callbacks so we can complete Clang types.
 580     ModuleSP module_sp (m_obj_file->GetModule());
 581     if (module_sp)
 582     {
 583         const SectionList *section_list = module_sp->GetSectionList();
 584
 585         const Section* section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
 586
 587         // Memory map the DWARF mach-o segment so we have everything mmap'ed
 588         // to keep our heap memory usage down.
 589         if (section)
 590             m_obj_file->MemoryMapSectionData(section, m_dwarf_data);
 591     }
 592     get_apple_names_data();
 593     if (m_data_apple_names.GetByteSize() > 0)
 594     {
 595         m_apple_names_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_names, get_debug_str_data(), ".apple_names"));
 596         if (m_apple_names_ap->IsValid())
 597             m_using_apple_tables = true;
 598         else
 599             m_apple_names_ap.reset();
 600     }
 601     get_apple_types_data();
 602     if (m_data_apple_types.GetByteSize() > 0)
 603     {
 604         m_apple_types_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_types, get_debug_str_data(), ".apple_types"));
 605         if (m_apple_types_ap->IsValid())
 606             m_using_apple_tables = true;
 607         else
 608             m_apple_types_ap.reset();
 609     }
 610
 611     get_apple_namespaces_data();
 612     if (m_data_apple_namespaces.GetByteSize() > 0)
 613     {
 614         m_apple_namespaces_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_namespaces, get_debug_str_data(), ".apple_namespaces"));
 615         if (m_apple_namespaces_ap->IsValid())
 616             m_using_apple_tables = true;
 617         else
 618             m_apple_namespaces_ap.reset();
 619     }
 620
 621     get_apple_objc_data();
 622     if (m_data_apple_objc.GetByteSize() > 0)
 623     {
 624         m_apple_objc_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_objc, get_debug_str_data(), ".apple_objc"));
 625         if (m_apple_objc_ap->IsValid())
 626             m_using_apple_tables = true;
 627         else
 628             m_apple_objc_ap.reset();
 629     }
 630 }
 631
 632 bool
 633 SymbolFileDWARF::SupportedVersion(uint16_t version)
 634 {
 635     return version == 2 || version == 3 || version == 4;
 636 }
 637
 638 uint32_t
 639 SymbolFileDWARF::CalculateAbilities ()
 640 {
 641     uint32_t abilities = 0;
 642     if (m_obj_file != NULL)
 643     {
 644         const Section* section = NULL;
 645         const SectionList *section_list = m_obj_file->GetSectionList();
 646         if (section_list == NULL)
 647             return 0;
 648
 649         uint64_t debug_abbrev_file_size = 0;
 650         uint64_t debug_info_file_size = 0;
 651         uint64_t debug_line_file_size = 0;
 652
 653         section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
 654
 655         if (section)
 656             section_list = &section->GetChildren ();
 657
 658         section = section_list->FindSectionByType (eSectionTypeDWARFDebugInfo, true).get();
 659         if (section != NULL)
 660         {
 661             debug_info_file_size = section->GetFileSize();
 662
 663             section = section_list->FindSectionByType (eSectionTypeDWARFDebugAbbrev, true).get();
 664             if (section)
 665                 debug_abbrev_file_size = section->GetFileSize();
 666             else
 667                 m_flags.Set (flagsGotDebugAbbrevData);
 668
 669             section = section_list->FindSectionByType (eSectionTypeDWARFDebugAranges, true).get();
 670             if (!section)
 671                 m_flags.Set (flagsGotDebugArangesData);
 672
 673             section = section_list->FindSectionByType (eSectionTypeDWARFDebugFrame, true).get();
 674             if (!section)
 675                 m_flags.Set (flagsGotDebugFrameData);
 676
 677             section = section_list->FindSectionByType (eSectionTypeDWARFDebugLine, true).get();
 678             if (section)
 679                 debug_line_file_size = section->GetFileSize();
 680             else
 681                 m_flags.Set (flagsGotDebugLineData);
 682
 683             section = section_list->FindSectionByType (eSectionTypeDWARFDebugLoc, true).get();
 684             if (!section)
 685                 m_flags.Set (flagsGotDebugLocData);
 686
 687             section = section_list->FindSectionByType (eSectionTypeDWARFDebugMacInfo, true).get();
 688             if (!section)
 689                 m_flags.Set (flagsGotDebugMacInfoData);
 690
 691             section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubNames, true).get();
 692             if (!section)
 693                 m_flags.Set (flagsGotDebugPubNamesData);
 694
 695             section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubTypes, true).get();
 696             if (!section)
 697                 m_flags.Set (flagsGotDebugPubTypesData);
 698
 699             section = section_list->FindSectionByType (eSectionTypeDWARFDebugRanges, true).get();
 700             if (!section)
 701                 m_flags.Set (flagsGotDebugRangesData);
 702
 703             section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
 704             if (!section)
 705                 m_flags.Set (flagsGotDebugStrData);
 706         }
 707         else
 708         {
 709             const char *symfile_dir_cstr = m_obj_file->GetFileSpec().GetDirectory().GetCString();
 710             if (symfile_dir_cstr)
 711             {
 712                 if (strcasestr(symfile_dir_cstr, ".dsym"))
 713                 {
 714                     if (m_obj_file->GetType() == ObjectFile::eTypeDebugInfo)
 715                     {
 716                         // We have a dSYM file that didn't have a any debug info.
 717                         // If the string table has a size of 1, then it was made from
 718                         // an executable with no debug info, or from an executable that
 719                         // was stripped.
 720                         section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
 721                         if (section && section->GetFileSize() == 1)
 722                         {
 723                             m_obj_file->GetModule()->ReportWarning ("empty dSYM file detected, dSYM was created with an executable with no debug info.");
 724                         }
 725                     }
 726                 }
 727             }
 728         }
 729
 730         if (debug_abbrev_file_size > 0 && debug_info_file_size > 0)
 731             abilities |= CompileUnits | Functions | Blocks | GlobalVariables | LocalVariables | VariableTypes;
 732
 733         if (debug_line_file_size > 0)
 734             abilities |= LineTables;
 735     }
 736     return abilities;
 737 }
 738
 739 const DWARFDataExtractor&
 740 SymbolFileDWARF::GetCachedSectionData (uint32_t got_flag, SectionType sect_type, DWARFDataExtractor &data)
 741 {
 742     if (m_flags.IsClear (got_flag))
 743     {
 744         ModuleSP module_sp (m_obj_file->GetModule());
 745         m_flags.Set (got_flag);
 746         const SectionList *section_list = module_sp->GetSectionList();
 747         if (section_list)
 748         {
 749             SectionSP section_sp (section_list->FindSectionByType(sect_type, true));
 750             if (section_sp)
 751             {
 752                 // See if we memory mapped the DWARF segment?
 753                 if (m_dwarf_data.GetByteSize())
 754                 {
 755                     data.SetData(m_dwarf_data, section_sp->GetOffset (), section_sp->GetFileSize());
 756                 }
 757                 else
 758                 {
 759                     if (m_obj_file->ReadSectionData (section_sp.get(), data) == 0)
 760                         data.Clear();
 761                 }
 762             }
 763         }
 764     }
 765     return data;
 766 }
 767
 768 const DWARFDataExtractor&
 769 SymbolFileDWARF::get_debug_abbrev_data()
 770 {
 771     return GetCachedSectionData (flagsGotDebugAbbrevData, eSectionTypeDWARFDebugAbbrev, m_data_debug_abbrev);
 772 }
 773
 774 const DWARFDataExtractor&
 775 SymbolFileDWARF::get_debug_aranges_data()
 776 {
 777     return GetCachedSectionData (flagsGotDebugArangesData, eSectionTypeDWARFDebugAranges, m_data_debug_aranges);
 778 }
 779
 780 const DWARFDataExtractor&
 781 SymbolFileDWARF::get_debug_frame_data()
 782 {
 783     return GetCachedSectionData (flagsGotDebugFrameData, eSectionTypeDWARFDebugFrame, m_data_debug_frame);
 784 }
 785
 786 const DWARFDataExtractor&
 787 SymbolFileDWARF::get_debug_info_data()
 788 {
 789     return GetCachedSectionData (flagsGotDebugInfoData, eSectionTypeDWARFDebugInfo, m_data_debug_info);
 790 }
 791
 792 const DWARFDataExtractor&
 793 SymbolFileDWARF::get_debug_line_data()
 794 {
 795     return GetCachedSectionData (flagsGotDebugLineData, eSectionTypeDWARFDebugLine, m_data_debug_line);
 796 }
 797
 798 const DWARFDataExtractor&
 799 SymbolFileDWARF::get_debug_loc_data()
 800 {
 801     return GetCachedSectionData (flagsGotDebugLocData, eSectionTypeDWARFDebugLoc, m_data_debug_loc);
 802 }
 803
 804 const DWARFDataExtractor&
 805 SymbolFileDWARF::get_debug_ranges_data()
 806 {
 807     return GetCachedSectionData (flagsGotDebugRangesData, eSectionTypeDWARFDebugRanges, m_data_debug_ranges);
 808 }
 809
 810 const DWARFDataExtractor&
 811 SymbolFileDWARF::get_debug_str_data()
 812 {
 813     return GetCachedSectionData (flagsGotDebugStrData, eSectionTypeDWARFDebugStr, m_data_debug_str);
 814 }
 815
 816 const DWARFDataExtractor&
 817 SymbolFileDWARF::get_apple_names_data()
 818 {
 819     return GetCachedSectionData (flagsGotAppleNamesData, eSectionTypeDWARFAppleNames, m_data_apple_names);
 820 }
 821
 822 const DWARFDataExtractor&
 823 SymbolFileDWARF::get_apple_types_data()
 824 {
 825     return GetCachedSectionData (flagsGotAppleTypesData, eSectionTypeDWARFAppleTypes, m_data_apple_types);
 826 }
 827
 828 const DWARFDataExtractor&
 829 SymbolFileDWARF::get_apple_namespaces_data()
 830 {
 831     return GetCachedSectionData (flagsGotAppleNamespacesData, eSectionTypeDWARFAppleNamespaces, m_data_apple_namespaces);
 832 }
 833
 834 const DWARFDataExtractor&
 835 SymbolFileDWARF::get_apple_objc_data()
 836 {
 837     return GetCachedSectionData (flagsGotAppleObjCData, eSectionTypeDWARFAppleObjC, m_data_apple_objc);
 838 }
 839
 840
 841 DWARFDebugAbbrev*
 842 SymbolFileDWARF::DebugAbbrev()
 843 {
 844     if (m_abbr.get() == NULL)
 845     {
 846         const DWARFDataExtractor &debug_abbrev_data = get_debug_abbrev_data();
 847         if (debug_abbrev_data.GetByteSize() > 0)
 848         {
 849             m_abbr.reset(new DWARFDebugAbbrev());
 850             if (m_abbr.get())
 851                 m_abbr->Parse(debug_abbrev_data);
 852         }
 853     }
 854     return m_abbr.get();
 855 }
 856
 857 const DWARFDebugAbbrev*
 858 SymbolFileDWARF::DebugAbbrev() const
 859 {
 860     return m_abbr.get();
 861 }
 862
 863
 864 DWARFDebugInfo*
 865 SymbolFileDWARF::DebugInfo()
 866 {
 867     if (m_info.get() == NULL)
 868     {
 869         Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p",
 870                            __PRETTY_FUNCTION__, static_cast<void*>(this));
 871         if (get_debug_info_data().GetByteSize() > 0)
 872         {
 873             m_info.reset(new DWARFDebugInfo());
 874             if (m_info.get())
 875             {
 876                 m_info->SetDwarfData(this);
 877             }
 878         }
 879     }
 880     return m_info.get();
 881 }
 882
 883 const DWARFDebugInfo*
 884 SymbolFileDWARF::DebugInfo() const
 885 {
 886     return m_info.get();
 887 }
 888
 889 DWARFCompileUnit*
 890 SymbolFileDWARF::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit)
 891 {
 892     DWARFDebugInfo* info = DebugInfo();
 893     if (info)
 894     {
 895         if (GetDebugMapSymfile ())
 896         {
 897             // The debug map symbol file made the compile units for this DWARF
 898             // file which is .o file with DWARF in it, and we should have
 899             // only 1 compile unit which is at offset zero in the DWARF.
 900             // TODO: modify to support LTO .o files where each .o file might
 901             // have multiple DW_TAG_compile_unit tags.
 902
 903             DWARFCompileUnit *dwarf_cu = info->GetCompileUnit(0).get();
 904             if (dwarf_cu && dwarf_cu->GetUserData() == NULL)
 905                 dwarf_cu->SetUserData(comp_unit);
 906             return dwarf_cu;
 907         }
 908         else
 909         {
 910             // Just a normal DWARF file whose user ID for the compile unit is
 911             // the DWARF offset itself
 912
 913             DWARFCompileUnit *dwarf_cu = info->GetCompileUnit((dw_offset_t)comp_unit->GetID()).get();
 914             if (dwarf_cu && dwarf_cu->GetUserData() == NULL)
 915                 dwarf_cu->SetUserData(comp_unit);
 916             return dwarf_cu;
 917
 918         }
 919     }
 920     return NULL;
 921 }
 922
 923
 924 DWARFDebugRanges*
 925 SymbolFileDWARF::DebugRanges()
 926 {
 927     if (m_ranges.get() == NULL)
 928     {
 929         Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p",
 930                            __PRETTY_FUNCTION__, static_cast<void*>(this));
 931         if (get_debug_ranges_data().GetByteSize() > 0)
 932         {
 933             m_ranges.reset(new DWARFDebugRanges());
 934             if (m_ranges.get())
 935                 m_ranges->Extract(this);
 936         }
 937     }
 938     return m_ranges.get();
 939 }
 940
 941 const DWARFDebugRanges*
 942 SymbolFileDWARF::DebugRanges() const
 943 {
 944     return m_ranges.get();
 945 }
 946
 947 lldb::CompUnitSP
 948 SymbolFileDWARF::ParseCompileUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
 949 {
 950     CompUnitSP cu_sp;
 951     if (dwarf_cu)
 952     {
 953         CompileUnit *comp_unit = (CompileUnit*)dwarf_cu->GetUserData();
 954         if (comp_unit)
 955         {
 956             // We already parsed this compile unit, had out a shared pointer to it
 957             cu_sp = comp_unit->shared_from_this();
 958         }
 959         else
 960         {
 961             if (GetDebugMapSymfile ())
 962             {
 963                 // Let the debug map create the compile unit
 964                 cu_sp = m_debug_map_symfile->GetCompileUnit(this);
 965                 dwarf_cu->SetUserData(cu_sp.get());
 966             }
 967             else
 968             {
 969                 ModuleSP module_sp (m_obj_file->GetModule());
 970                 if (module_sp)
 971                 {
 972                     const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly ();
 973                     if (cu_die)
 974                     {
 975                         FileSpec cu_file_spec{cu_die->GetName(this, dwarf_cu), false};
 976                         if (cu_file_spec)
 977                         {
 978                             // If we have a full path to the compile unit, we don't need to resolve
 979                             // the file.  This can be expensive e.g. when the source files are NFS mounted.
 980                             if (cu_file_spec.IsRelative())
 981                             {
 982                                 // DWARF2/3 suggests the form hostname:pathname for compilation directory.
 983                                 // Remove the host part if present.
 984                                 const char *cu_comp_dir{cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, nullptr)};
 985                                 cu_file_spec.PrependPathComponent(removeHostnameFromPathname(cu_comp_dir));
 986                             }
 987
 988                             std::string remapped_file;
 989                             if (module_sp->RemapSourceFile(cu_file_spec.GetCString(), remapped_file))
 990                                 cu_file_spec.SetFile(remapped_file, false);
 991
 992                             LanguageType cu_language = DWARFCompileUnit::LanguageTypeFromDWARF(cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0));
 993
 994                             cu_sp.reset(new CompileUnit (module_sp,
 995                                                          dwarf_cu,
 996                                                          cu_file_spec,
 997                                                          MakeUserID(dwarf_cu->GetOffset()),
 998                                                          cu_language));
 999                             if (cu_sp)
1000                             {
1001                                 dwarf_cu->SetUserData(cu_sp.get());
1002
1003                                 // Figure out the compile unit index if we weren't given one
1004                                 if (cu_idx == UINT32_MAX)
1005                                     DebugInfo()->GetCompileUnit(dwarf_cu->GetOffset(), &cu_idx);
1006
1007                                 m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex(cu_idx, cu_sp);
1008                             }
1009                         }
1010                     }
1011                 }
1012             }
1013         }
1014     }
1015     return cu_sp;
1016 }
1017
1018 uint32_t
1019 SymbolFileDWARF::GetNumCompileUnits()
1020 {
1021     DWARFDebugInfo* info = DebugInfo();
1022     if (info)
1023         return info->GetNumCompileUnits();
1024     return 0;
1025 }
1026
1027 CompUnitSP
1028 SymbolFileDWARF::ParseCompileUnitAtIndex(uint32_t cu_idx)
1029 {
1030     CompUnitSP cu_sp;
1031     DWARFDebugInfo* info = DebugInfo();
1032     if (info)
1033     {
1034         DWARFCompileUnit* dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
1035         if (dwarf_cu)
1036             cu_sp = ParseCompileUnit(dwarf_cu, cu_idx);
1037     }
1038     return cu_sp;
1039 }
1040
1041 Function *
1042 SymbolFileDWARF::ParseCompileUnitFunction (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die)
1043 {
1044     DWARFDebugRanges::RangeList func_ranges;
1045     const char *name = NULL;
1046     const char *mangled = NULL;
1047     int decl_file = 0;
1048     int decl_line = 0;
1049     int decl_column = 0;
1050     int call_file = 0;
1051     int call_line = 0;
1052     int call_column = 0;
1053     DWARFExpression frame_base;
1054
1055     assert (die->Tag() == DW_TAG_subprogram);
1056
1057     if (die->Tag() != DW_TAG_subprogram)
1058         return NULL;
1059
1060     if (die->GetDIENamesAndRanges (this,
1061                                    dwarf_cu,
1062                                    name,
1063                                    mangled,
1064                                    func_ranges,
1065                                    decl_file,
1066                                    decl_line,
1067                                    decl_column,
1068                                    call_file,
1069                                    call_line,
1070                                    call_column,
1071                                    &frame_base))
1072     {
1073         // Union of all ranges in the function DIE (if the function is discontiguous)
1074         AddressRange func_range;
1075         lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase (0);
1076         lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd (0);
1077         if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr)
1078         {
1079             ModuleSP module_sp (m_obj_file->GetModule());
1080             func_range.GetBaseAddress().ResolveAddressUsingFileSections (lowest_func_addr, module_sp->GetSectionList());
1081             if (func_range.GetBaseAddress().IsValid())
1082                 func_range.SetByteSize(highest_func_addr - lowest_func_addr);
1083         }
1084
1085         if (func_range.GetBaseAddress().IsValid())
1086         {
1087             Mangled func_name;
1088             if (mangled)
1089                 func_name.SetValue(ConstString(mangled), true);
1090             else if (die->GetParent()->Tag() == DW_TAG_compile_unit &&
1091                      LanguageRuntime::LanguageIsCPlusPlus(dwarf_cu->GetLanguageType()) &&
1092                      name && strcmp(name, "main") != 0)
1093             {
1094                 // If the mangled name is not present in the DWARF, generate the demangled name
1095                 // using the decl context. We skip if the function is "main" as its name is
1096                 // never mangled.
1097                 bool is_static = false;
1098                 bool is_variadic = false;
1099                 unsigned type_quals = 0;
1100                 std::vector<ClangASTType> param_types;
1101                 std::vector<clang::ParmVarDecl*> param_decls;
1102                 const DWARFDebugInfoEntry *decl_ctx_die = NULL;
1103                 DWARFDeclContext decl_ctx;
1104                 StreamString sstr;
1105
1106                 die->GetDWARFDeclContext(this, dwarf_cu, decl_ctx);
1107                 sstr << decl_ctx.GetQualifiedName();
1108
1109                 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE(dwarf_cu,
1110                                                                                            die,
1111                                                                                            &decl_ctx_die);
1112                 ParseChildParameters(sc,
1113                                      containing_decl_ctx,
1114                                      dwarf_cu,
1115                                      die,
1116                                      true,
1117                                      is_static,
1118                                      is_variadic,
1119                                      param_types,
1120                                      param_decls,
1121                                      type_quals);
1122                 sstr << "(";
1123                 for (size_t i = 0; i < param_types.size(); i++)
1124                 {
1125                     if (i > 0)
1126                         sstr << ", ";
1127                     sstr << param_types[i].GetTypeName();
1128                 }
1129                 if (is_variadic)
1130                     sstr << ", ...";
1131                 sstr << ")";
1132                 if (type_quals & clang::Qualifiers::Const)
1133                     sstr << " const";
1134
1135                 func_name.SetValue(ConstString(sstr.GetData()), false);
1136             }
1137             else
1138                 func_name.SetValue(ConstString(name), false);
1139
1140             FunctionSP func_sp;
1141             std::unique_ptr<Declaration> decl_ap;
1142             if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1143                 decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1144                                                decl_line,
1145                                                decl_column));
1146
1147             // Supply the type _only_ if it has already been parsed
1148             Type *func_type = m_die_to_type.lookup (die);
1149
1150             assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED);
1151
1152             if (FixupAddress (func_range.GetBaseAddress()))
1153             {
1154                 const user_id_t func_user_id = MakeUserID(die->GetOffset());
1155                 func_sp.reset(new Function (sc.comp_unit,
1156                                             MakeUserID(func_user_id),       // UserID is the DIE offset
1157                                             MakeUserID(func_user_id),
1158                                             func_name,
1159                                             func_type,
1160                                             func_range));           // first address range
1161
1162                 if (func_sp.get() != NULL)
1163                 {
1164                     if (frame_base.IsValid())
1165                         func_sp->GetFrameBaseExpression() = frame_base;
1166                     sc.comp_unit->AddFunction(func_sp);
1167                     return func_sp.get();
1168                 }
1169             }
1170         }
1171     }
1172     return NULL;
1173 }
1174
1175 bool
1176 SymbolFileDWARF::FixupAddress (Address &addr)
1177 {
1178     SymbolFileDWARFDebugMap * debug_map_symfile = GetDebugMapSymfile ();
1179     if (debug_map_symfile)
1180     {
1181         return debug_map_symfile->LinkOSOAddress(addr);
1182     }
1183     // This is a normal DWARF file, no address fixups need to happen
1184     return true;
1185 }
1186 lldb::LanguageType
1187 SymbolFileDWARF::ParseCompileUnitLanguage (const SymbolContext& sc)
1188 {
1189     assert (sc.comp_unit);
1190     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1191     if (dwarf_cu)
1192     {
1193         const DWARFDebugInfoEntry *die = dwarf_cu->GetCompileUnitDIEOnly();
1194         if (die)
1195             return DWARFCompileUnit::LanguageTypeFromDWARF(die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0));
1196     }
1197     return eLanguageTypeUnknown;
1198 }
1199
1200 size_t
1201 SymbolFileDWARF::ParseCompileUnitFunctions(const SymbolContext &sc)
1202 {
1203     assert (sc.comp_unit);
1204     size_t functions_added = 0;
1205     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1206     if (dwarf_cu)
1207     {
1208         DWARFDIECollection function_dies;
1209         const size_t num_functions = dwarf_cu->AppendDIEsWithTag (DW_TAG_subprogram, function_dies);
1210         size_t func_idx;
1211         for (func_idx = 0; func_idx < num_functions; ++func_idx)
1212         {
1213             const DWARFDebugInfoEntry *die = function_dies.GetDIEPtrAtIndex(func_idx);
1214             if (sc.comp_unit->FindFunctionByUID (MakeUserID(die->GetOffset())).get() == NULL)
1215             {
1216                 if (ParseCompileUnitFunction(sc, dwarf_cu, die))
1217                     ++functions_added;
1218             }
1219         }
1220         //FixupTypes();
1221     }
1222     return functions_added;
1223 }
1224
1225 bool
1226 SymbolFileDWARF::ParseCompileUnitSupportFiles (const SymbolContext& sc, FileSpecList& support_files)
1227 {
1228     assert (sc.comp_unit);
1229     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1230     if (dwarf_cu)
1231     {
1232         const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1233
1234         if (cu_die)
1235         {
1236             const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
1237
1238             // DWARF2/3 suggests the form hostname:pathname for compilation directory.
1239             // Remove the host part if present.
1240             cu_comp_dir = removeHostnameFromPathname(cu_comp_dir);
1241
1242             dw_offset_t stmt_list = cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1243
1244             // All file indexes in DWARF are one based and a file of index zero is
1245             // supposed to be the compile unit itself.
1246             support_files.Append (*sc.comp_unit);
1247
1248             return DWARFDebugLine::ParseSupportFiles(sc.comp_unit->GetModule(), get_debug_line_data(), cu_comp_dir, stmt_list, support_files);
1249         }
1250     }
1251     return false;
1252 }
1253
1254 bool
1255 SymbolFileDWARF::ParseImportedModules (const lldb_private::SymbolContext &sc, std::vector<lldb_private::ConstString> &imported_modules)
1256 {
1257     assert (sc.comp_unit);
1258     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1259     if (dwarf_cu)
1260     {
1261         if (ClangModulesDeclVendor::LanguageSupportsClangModules(sc.comp_unit->GetLanguage()))
1262         {
1263             UpdateExternalModuleListIfNeeded();
1264             for (const std::pair<uint64_t, const ClangModuleInfo> &external_type_module : m_external_type_modules)
1265             {
1266                 imported_modules.push_back(external_type_module.second.m_name);
1267             }
1268         }
1269     }
1270     return false;
1271 }
1272
1273 struct ParseDWARFLineTableCallbackInfo
1274 {
1275     LineTable* line_table;
1276     std::unique_ptr<LineSequence> sequence_ap;
1277 };
1278
1279 //----------------------------------------------------------------------
1280 // ParseStatementTableCallback
1281 //----------------------------------------------------------------------
1282 static void
1283 ParseDWARFLineTableCallback(dw_offset_t offset, const DWARFDebugLine::State& state, void* userData)
1284 {
1285     if (state.row == DWARFDebugLine::State::StartParsingLineTable)
1286     {
1287         // Just started parsing the line table
1288     }
1289     else if (state.row == DWARFDebugLine::State::DoneParsingLineTable)
1290     {
1291         // Done parsing line table, nothing to do for the cleanup
1292     }
1293     else
1294     {
1295         ParseDWARFLineTableCallbackInfo* info = (ParseDWARFLineTableCallbackInfo*)userData;
1296         LineTable* line_table = info->line_table;
1297
1298         // If this is our first time here, we need to create a
1299         // sequence container.
1300         if (!info->sequence_ap.get())
1301         {
1302             info->sequence_ap.reset(line_table->CreateLineSequenceContainer());
1303             assert(info->sequence_ap.get());
1304         }
1305         line_table->AppendLineEntryToSequence (info->sequence_ap.get(),
1306                                                state.address,
1307                                                state.line,
1308                                                state.column,
1309                                                state.file,
1310                                                state.is_stmt,
1311                                                state.basic_block,
1312                                                state.prologue_end,
1313                                                state.epilogue_begin,
1314                                                state.end_sequence);
1315         if (state.end_sequence)
1316         {
1317             // First, put the current sequence into the line table.
1318             line_table->InsertSequence(info->sequence_ap.get());
1319             // Then, empty it to prepare for the next sequence.
1320             info->sequence_ap->Clear();
1321         }
1322     }
1323 }
1324
1325 bool
1326 SymbolFileDWARF::ParseCompileUnitLineTable (const SymbolContext &sc)
1327 {
1328     assert (sc.comp_unit);
1329     if (sc.comp_unit->GetLineTable() != NULL)
1330         return true;
1331
1332     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1333     if (dwarf_cu)
1334     {
1335         const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1336         if (dwarf_cu_die)
1337         {
1338             const dw_offset_t cu_line_offset = dwarf_cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1339             if (cu_line_offset != DW_INVALID_OFFSET)
1340             {
1341                 std::unique_ptr<LineTable> line_table_ap(new LineTable(sc.comp_unit));
1342                 if (line_table_ap.get())
1343                 {
1344                     ParseDWARFLineTableCallbackInfo info;
1345                     info.line_table = line_table_ap.get();
1346                     lldb::offset_t offset = cu_line_offset;
1347                     DWARFDebugLine::ParseStatementTable(get_debug_line_data(), &offset, ParseDWARFLineTableCallback, &info);
1348                     if (m_debug_map_symfile)
1349                     {
1350                         // We have an object file that has a line table with addresses
1351                         // that are not linked. We need to link the line table and convert
1352                         // the addresses that are relative to the .o file into addresses
1353                         // for the main executable.
1354                         sc.comp_unit->SetLineTable (m_debug_map_symfile->LinkOSOLineTable (this, line_table_ap.get()));
1355                     }
1356                     else
1357                     {
1358                         sc.comp_unit->SetLineTable(line_table_ap.release());
1359                         return true;
1360                     }
1361                 }
1362             }
1363         }
1364     }
1365     return false;
1366 }
1367
1368 size_t
1369 SymbolFileDWARF::ParseFunctionBlocks
1370 (
1371     const SymbolContext& sc,
1372     Block *parent_block,
1373     DWARFCompileUnit* dwarf_cu,
1374     const DWARFDebugInfoEntry *die,
1375     addr_t subprogram_low_pc,
1376     uint32_t depth
1377 )
1378 {
1379     size_t blocks_added = 0;
1380     while (die != NULL)
1381     {
1382         dw_tag_t tag = die->Tag();
1383
1384         switch (tag)
1385         {
1386         case DW_TAG_inlined_subroutine:
1387         case DW_TAG_subprogram:
1388         case DW_TAG_lexical_block:
1389             {
1390                 Block *block = NULL;
1391                 if (tag == DW_TAG_subprogram)
1392                 {
1393                     // Skip any DW_TAG_subprogram DIEs that are inside
1394                     // of a normal or inlined functions. These will be
1395                     // parsed on their own as separate entities.
1396
1397                     if (depth > 0)
1398                         break;
1399
1400                     block = parent_block;
1401                 }
1402                 else
1403                 {
1404                     BlockSP block_sp(new Block (MakeUserID(die->GetOffset())));
1405                     parent_block->AddChild(block_sp);
1406                     block = block_sp.get();
1407                 }
1408                 DWARFDebugRanges::RangeList ranges;
1409                 const char *name = NULL;
1410                 const char *mangled_name = NULL;
1411
1412                 int decl_file = 0;
1413                 int decl_line = 0;
1414                 int decl_column = 0;
1415                 int call_file = 0;
1416                 int call_line = 0;
1417                 int call_column = 0;
1418                 if (die->GetDIENamesAndRanges (this,
1419                                                dwarf_cu,
1420                                                name,
1421                                                mangled_name,
1422                                                ranges,
1423                                                decl_file, decl_line, decl_column,
1424                                                call_file, call_line, call_column))
1425                 {
1426                     if (tag == DW_TAG_subprogram)
1427                     {
1428                         assert (subprogram_low_pc == LLDB_INVALID_ADDRESS);
1429                         subprogram_low_pc = ranges.GetMinRangeBase(0);
1430                     }
1431                     else if (tag == DW_TAG_inlined_subroutine)
1432                     {
1433                         // We get called here for inlined subroutines in two ways.
1434                         // The first time is when we are making the Function object
1435                         // for this inlined concrete instance.  Since we're creating a top level block at
1436                         // here, the subprogram_low_pc will be LLDB_INVALID_ADDRESS.  So we need to
1437                         // adjust the containing address.
1438                         // The second time is when we are parsing the blocks inside the function that contains
1439                         // the inlined concrete instance.  Since these will be blocks inside the containing "real"
1440                         // function the offset will be for that function.
1441                         if (subprogram_low_pc == LLDB_INVALID_ADDRESS)
1442                         {
1443                             subprogram_low_pc = ranges.GetMinRangeBase(0);
1444                         }
1445                     }
1446
1447                     const size_t num_ranges = ranges.GetSize();
1448                     for (size_t i = 0; i<num_ranges; ++i)
1449                     {
1450                         const DWARFDebugRanges::Range &range = ranges.GetEntryRef (i);
1451                         const addr_t range_base = range.GetRangeBase();
1452                         if (range_base >= subprogram_low_pc)
1453                             block->AddRange(Block::Range (range_base - subprogram_low_pc, range.GetByteSize()));
1454                         else
1455                         {
1456                             GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": adding range [0x%" PRIx64 "-0x%" PRIx64 ") which has a base that is less than the function's low PC 0x%" PRIx64 ". Please file a bug and attach the file at the start of this error message",
1457                                                                        block->GetID(),
1458                                                                        range_base,
1459                                                                        range.GetRangeEnd(),
1460                                                                        subprogram_low_pc);
1461                         }
1462                     }
1463                     block->FinalizeRanges ();
1464
1465                     if (tag != DW_TAG_subprogram && (name != NULL || mangled_name != NULL))
1466                     {
1467                         std::unique_ptr<Declaration> decl_ap;
1468                         if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1469                             decl_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1470                                                           decl_line, decl_column));
1471
1472                         std::unique_ptr<Declaration> call_ap;
1473                         if (call_file != 0 || call_line != 0 || call_column != 0)
1474                             call_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(call_file),
1475                                                           call_line, call_column));
1476
1477                         block->SetInlinedFunctionInfo (name, mangled_name, decl_ap.get(), call_ap.get());
1478                     }
1479
1480                     ++blocks_added;
1481
1482                     if (die->HasChildren())
1483                     {
1484                         blocks_added += ParseFunctionBlocks (sc,
1485                                                              block,
1486                                                              dwarf_cu,
1487                                                              die->GetFirstChild(),
1488                                                              subprogram_low_pc,
1489                                                              depth + 1);
1490                     }
1491                 }
1492             }
1493             break;
1494         default:
1495             break;
1496         }
1497
1498         // Only parse siblings of the block if we are not at depth zero. A depth
1499         // of zero indicates we are currently parsing the top level
1500         // DW_TAG_subprogram DIE
1501
1502         if (depth == 0)
1503             die = NULL;
1504         else
1505             die = die->GetSibling();
1506     }
1507     return blocks_added;
1508 }
1509
1510 bool
1511 SymbolFileDWARF::ParseTemplateDIE (DWARFCompileUnit* dwarf_cu,
1512                                    const DWARFDebugInfoEntry *die,
1513                                    ClangASTContext::TemplateParameterInfos &template_param_infos)
1514 {
1515     const dw_tag_t tag = die->Tag();
1516
1517     switch (tag)
1518     {
1519     case DW_TAG_template_type_parameter:
1520     case DW_TAG_template_value_parameter:
1521         {
1522             const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
1523
1524             DWARFDebugInfoEntry::Attributes attributes;
1525             const size_t num_attributes = die->GetAttributes (this,
1526                                                               dwarf_cu,
1527                                                               fixed_form_sizes,
1528                                                               attributes);
1529             const char *name = NULL;
1530             Type *lldb_type = NULL;
1531             ClangASTType clang_type;
1532             uint64_t uval64 = 0;
1533             bool uval64_valid = false;
1534             if (num_attributes > 0)
1535             {
1536                 DWARFFormValue form_value;
1537                 for (size_t i=0; i<num_attributes; ++i)
1538                 {
1539                     const dw_attr_t attr = attributes.AttributeAtIndex(i);
1540
1541                     switch (attr)
1542                     {
1543                         case DW_AT_name:
1544                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1545                                 name = form_value.AsCString(&get_debug_str_data());
1546                             break;
1547
1548                         case DW_AT_type:
1549                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1550                             {
1551                                 const dw_offset_t type_die_offset = form_value.Reference();
1552                                 lldb_type = ResolveTypeUID(type_die_offset);
1553                                 if (lldb_type)
1554                                     clang_type = lldb_type->GetClangForwardType();
1555                             }
1556                             break;
1557
1558                         case DW_AT_const_value:
1559                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1560                             {
1561                                 uval64_valid = true;
1562                                 uval64 = form_value.Unsigned();
1563                             }
1564                             break;
1565                         default:
1566                             break;
1567                     }
1568                 }
1569
1570                 clang::ASTContext *ast = GetClangASTContext().getASTContext();
1571                 if (!clang_type)
1572                     clang_type = GetClangASTContext().GetBasicType(eBasicTypeVoid);
1573
1574                 if (clang_type)
1575                 {
1576                     bool is_signed = false;
1577                     if (name && name[0])
1578                         template_param_infos.names.push_back(name);
1579                     else
1580                         template_param_infos.names.push_back(NULL);
1581
1582                     if (tag == DW_TAG_template_value_parameter &&
1583                         lldb_type != NULL &&
1584                         clang_type.IsIntegerType (is_signed) &&
1585                         uval64_valid)
1586                     {
1587                         llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed);
1588                         template_param_infos.args.push_back (clang::TemplateArgument (*ast,
1589                                                                                       llvm::APSInt(apint),
1590                                                                                       clang_type.GetQualType()));
1591                     }
1592                     else
1593                     {
1594                         template_param_infos.args.push_back (clang::TemplateArgument (clang_type.GetQualType()));
1595                     }
1596                 }
1597                 else
1598                 {
1599                     return false;
1600                 }
1601
1602             }
1603         }
1604         return true;
1605
1606     default:
1607         break;
1608     }
1609     return false;
1610 }
1611
1612 bool
1613 SymbolFileDWARF::ParseTemplateParameterInfos (DWARFCompileUnit* dwarf_cu,
1614                                               const DWARFDebugInfoEntry *parent_die,
1615                                               ClangASTContext::TemplateParameterInfos &template_param_infos)
1616 {
1617
1618     if (parent_die == NULL)
1619         return false;
1620
1621     Args template_parameter_names;
1622     for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild();
1623          die != NULL;
1624          die = die->GetSibling())
1625     {
1626         const dw_tag_t tag = die->Tag();
1627
1628         switch (tag)
1629         {
1630             case DW_TAG_template_type_parameter:
1631             case DW_TAG_template_value_parameter:
1632                 ParseTemplateDIE (dwarf_cu, die, template_param_infos);
1633             break;
1634
1635         default:
1636             break;
1637         }
1638     }
1639     if (template_param_infos.args.empty())
1640         return false;
1641     return template_param_infos.args.size() == template_param_infos.names.size();
1642 }
1643
1644 clang::ClassTemplateDecl *
1645 SymbolFileDWARF::ParseClassTemplateDecl (clang::DeclContext *decl_ctx,
1646                                          lldb::AccessType access_type,
1647                                          const char *parent_name,
1648                                          int tag_decl_kind,
1649                                          const ClangASTContext::TemplateParameterInfos &template_param_infos)
1650 {
1651     if (template_param_infos.IsValid())
1652     {
1653         std::string template_basename(parent_name);
1654         template_basename.erase (template_basename.find('<'));
1655         ClangASTContext &ast = GetClangASTContext();
1656
1657         return ast.CreateClassTemplateDecl (decl_ctx,
1658                                             access_type,
1659                                             template_basename.c_str(),
1660                                             tag_decl_kind,
1661                                             template_param_infos);
1662     }
1663     return NULL;
1664 }
1665
1666 class SymbolFileDWARF::DelayedAddObjCClassProperty
1667 {
1668 public:
1669     DelayedAddObjCClassProperty
1670     (
1671         const ClangASTType     &class_opaque_type,
1672         const char             *property_name,
1673         const ClangASTType     &property_opaque_type,  // The property type is only required if you don't have an ivar decl
1674         clang::ObjCIvarDecl    *ivar_decl,
1675         const char             *property_setter_name,
1676         const char             *property_getter_name,
1677         uint32_t                property_attributes,
1678         const ClangASTMetadata *metadata
1679     ) :
1680         m_class_opaque_type     (class_opaque_type),
1681         m_property_name         (property_name),
1682         m_property_opaque_type  (property_opaque_type),
1683         m_ivar_decl             (ivar_decl),
1684         m_property_setter_name  (property_setter_name),
1685         m_property_getter_name  (property_getter_name),
1686         m_property_attributes   (property_attributes)
1687     {
1688         if (metadata != NULL)
1689         {
1690             m_metadata_ap.reset(new ClangASTMetadata());
1691             *m_metadata_ap = *metadata;
1692         }
1693     }
1694
1695     DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs)
1696     {
1697         *this = rhs;
1698     }
1699
1700     DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs)
1701     {
1702         m_class_opaque_type    = rhs.m_class_opaque_type;
1703         m_property_name        = rhs.m_property_name;
1704         m_property_opaque_type = rhs.m_property_opaque_type;
1705         m_ivar_decl            = rhs.m_ivar_decl;
1706         m_property_setter_name = rhs.m_property_setter_name;
1707         m_property_getter_name = rhs.m_property_getter_name;
1708         m_property_attributes  = rhs.m_property_attributes;
1709
1710         if (rhs.m_metadata_ap.get())
1711         {
1712             m_metadata_ap.reset (new ClangASTMetadata());
1713             *m_metadata_ap = *rhs.m_metadata_ap;
1714         }
1715         return *this;
1716     }
1717
1718     bool
1719     Finalize()
1720     {
1721         return m_class_opaque_type.AddObjCClassProperty (m_property_name,
1722                                                          m_property_opaque_type,
1723                                                          m_ivar_decl,
1724                                                          m_property_setter_name,
1725                                                          m_property_getter_name,
1726                                                          m_property_attributes,
1727                                                          m_metadata_ap.get());
1728     }
1729 private:
1730     ClangASTType            m_class_opaque_type;
1731     const char             *m_property_name;
1732     ClangASTType            m_property_opaque_type;
1733     clang::ObjCIvarDecl    *m_ivar_decl;
1734     const char             *m_property_setter_name;
1735     const char             *m_property_getter_name;
1736     uint32_t                m_property_attributes;
1737     std::unique_ptr<ClangASTMetadata> m_metadata_ap;
1738 };
1739
1740 struct BitfieldInfo
1741 {
1742     uint64_t bit_size;
1743     uint64_t bit_offset;
1744
1745     BitfieldInfo () :
1746         bit_size (LLDB_INVALID_ADDRESS),
1747         bit_offset (LLDB_INVALID_ADDRESS)
1748     {
1749     }
1750
1751     void
1752     Clear()
1753     {
1754         bit_size = LLDB_INVALID_ADDRESS;
1755         bit_offset = LLDB_INVALID_ADDRESS;
1756     }
1757
1758     bool IsValid ()
1759     {
1760         return (bit_size != LLDB_INVALID_ADDRESS) &&
1761                (bit_offset != LLDB_INVALID_ADDRESS);
1762     }
1763 };
1764
1765
1766 bool
1767 SymbolFileDWARF::ClassOrStructIsVirtual (DWARFCompileUnit* dwarf_cu,
1768                                          const DWARFDebugInfoEntry *parent_die)
1769 {
1770     if (parent_die)
1771     {
1772         for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1773         {
1774             dw_tag_t tag = die->Tag();
1775             bool check_virtuality = false;
1776             switch (tag)
1777             {
1778                 case DW_TAG_inheritance:
1779                 case DW_TAG_subprogram:
1780                     check_virtuality = true;
1781                     break;
1782                 default:
1783                     break;
1784             }
1785             if (check_virtuality)
1786             {
1787                 if (die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_virtuality, 0) != 0)
1788                     return true;
1789             }
1790         }
1791     }
1792     return false;
1793 }
1794
1795 size_t
1796 SymbolFileDWARF::ParseChildMembers
1797 (
1798     const SymbolContext& sc,
1799     DWARFCompileUnit* dwarf_cu,
1800     const DWARFDebugInfoEntry *parent_die,
1801     ClangASTType &class_clang_type,
1802     const LanguageType class_language,
1803     std::vector<clang::CXXBaseSpecifier *>& base_classes,
1804     std::vector<int>& member_accessibilities,
1805     DWARFDIECollection& member_function_dies,
1806     DelayedPropertyList& delayed_properties,
1807     AccessType& default_accessibility,
1808     bool &is_a_class,
1809     LayoutInfo &layout_info
1810 )
1811 {
1812     if (parent_die == NULL)
1813         return 0;
1814
1815     size_t count = 0;
1816     const DWARFDebugInfoEntry *die;
1817     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
1818     uint32_t member_idx = 0;
1819     BitfieldInfo last_field_info;
1820     ModuleSP module = GetObjectFile()->GetModule();
1821
1822     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1823     {
1824         dw_tag_t tag = die->Tag();
1825
1826         switch (tag)
1827         {
1828         case DW_TAG_member:
1829         case DW_TAG_APPLE_property:
1830             {
1831                 DWARFDebugInfoEntry::Attributes attributes;
1832                 const size_t num_attributes = die->GetAttributes (this,
1833                                                                   dwarf_cu,
1834                                                                   fixed_form_sizes,
1835                                                                   attributes);
1836                 if (num_attributes > 0)
1837                 {
1838                     Declaration decl;
1839                     //DWARFExpression location;
1840                     const char *name = NULL;
1841                     const char *prop_name = NULL;
1842                     const char *prop_getter_name = NULL;
1843                     const char *prop_setter_name = NULL;
1844                     uint32_t prop_attributes = 0;
1845
1846
1847                     bool is_artificial = false;
1848                     lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
1849                     AccessType accessibility = eAccessNone;
1850                     uint32_t member_byte_offset = UINT32_MAX;
1851                     size_t byte_size = 0;
1852                     size_t bit_offset = 0;
1853                     size_t bit_size = 0;
1854                     bool is_external = false; // On DW_TAG_members, this means the member is static
1855                     uint32_t i;
1856                     for (i=0; i<num_attributes && !is_artificial; ++i)
1857                     {
1858                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
1859                         DWARFFormValue form_value;
1860                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1861                         {
1862                             switch (attr)
1863                             {
1864                             case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
1865                             case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
1866                             case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
1867                             case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
1868                             case DW_AT_type:        encoding_uid = form_value.Reference(); break;
1869                             case DW_AT_bit_offset:  bit_offset = form_value.Unsigned(); break;
1870                             case DW_AT_bit_size:    bit_size = form_value.Unsigned(); break;
1871                             case DW_AT_byte_size:   byte_size = form_value.Unsigned(); break;
1872                             case DW_AT_data_member_location:
1873                                 if (form_value.BlockData())
1874                                 {
1875                                     Value initialValue(0);
1876                                     Value memberOffset(0);
1877                                     const DWARFDataExtractor& debug_info_data = get_debug_info_data();
1878                                     uint32_t block_length = form_value.Unsigned();
1879                                     uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
1880                                     if (DWARFExpression::Evaluate(NULL, // ExecutionContext *
1881                                                                   NULL, // ClangExpressionVariableList *
1882                                                                   NULL, // ClangExpressionDeclMap *
1883                                                                   NULL, // RegisterContext *
1884                                                                   module,
1885                                                                   debug_info_data,
1886                                                                   block_offset,
1887                                                                   block_length,
1888                                                                   eRegisterKindDWARF,
1889                                                                   &initialValue,
1890                                                                   memberOffset,
1891                                                                   NULL))
1892                                     {
1893                                         member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
1894                                     }
1895                                 }
1896                                 else
1897                                 {
1898                                     // With DWARF 3 and later, if the value is an integer constant,
1899                                     // this form value is the offset in bytes from the beginning
1900                                     // of the containing entity.
1901                                     member_byte_offset = form_value.Unsigned();
1902                                 }
1903                                 break;
1904
1905                             case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType (form_value.Unsigned()); break;
1906                             case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
1907                             case DW_AT_APPLE_property_name:      prop_name = form_value.AsCString(&get_debug_str_data()); break;
1908                             case DW_AT_APPLE_property_getter:    prop_getter_name = form_value.AsCString(&get_debug_str_data()); break;
1909                             case DW_AT_APPLE_property_setter:    prop_setter_name = form_value.AsCString(&get_debug_str_data()); break;
1910                             case DW_AT_APPLE_property_attribute: prop_attributes = form_value.Unsigned(); break;
1911                             case DW_AT_external:                 is_external = form_value.Boolean(); break;
1912
1913                             default:
1914                             case DW_AT_declaration:
1915                             case DW_AT_description:
1916                             case DW_AT_mutable:
1917                             case DW_AT_visibility:
1918                             case DW_AT_sibling:
1919                                 break;
1920                             }
1921                         }
1922                     }
1923
1924                     if (prop_name)
1925                     {
1926                         ConstString fixed_getter;
1927                         ConstString fixed_setter;
1928
1929                         // Check if the property getter/setter were provided as full
1930                         // names.  We want basenames, so we extract them.
1931
1932                         if (prop_getter_name && prop_getter_name[0] == '-')
1933                         {
1934                             ObjCLanguageRuntime::MethodName prop_getter_method(prop_getter_name, true);
1935                             prop_getter_name = prop_getter_method.GetSelector().GetCString();
1936                         }
1937
1938                         if (prop_setter_name && prop_setter_name[0] == '-')
1939                         {
1940                             ObjCLanguageRuntime::MethodName prop_setter_method(prop_setter_name, true);
1941                             prop_setter_name = prop_setter_method.GetSelector().GetCString();
1942                         }
1943
1944                         // If the names haven't been provided, they need to be
1945                         // filled in.
1946
1947                         if (!prop_getter_name)
1948                         {
1949                             prop_getter_name = prop_name;
1950                         }
1951                         if (!prop_setter_name && prop_name[0] && !(prop_attributes & DW_APPLE_PROPERTY_readonly))
1952                         {
1953                             StreamString ss;
1954
1955                             ss.Printf("set%c%s:",
1956                                       toupper(prop_name[0]),
1957                                       &prop_name[1]);
1958
1959                             fixed_setter.SetCString(ss.GetData());
1960                             prop_setter_name = fixed_setter.GetCString();
1961                         }
1962                     }
1963
1964                     // Clang has a DWARF generation bug where sometimes it
1965                     // represents fields that are references with bad byte size
1966                     // and bit size/offset information such as:
1967                     //
1968                     //  DW_AT_byte_size( 0x00 )
1969                     //  DW_AT_bit_size( 0x40 )
1970                     //  DW_AT_bit_offset( 0xffffffffffffffc0 )
1971                     //
1972                     // So check the bit offset to make sure it is sane, and if
1973                     // the values are not sane, remove them. If we don't do this
1974                     // then we will end up with a crash if we try to use this
1975                     // type in an expression when clang becomes unhappy with its
1976                     // recycled debug info.
1977
1978                     if (bit_offset > 128)
1979                     {
1980                         bit_size = 0;
1981                         bit_offset = 0;
1982                     }
1983
1984                     // FIXME: Make Clang ignore Objective-C accessibility for expressions
1985                     if (class_language == eLanguageTypeObjC ||
1986                         class_language == eLanguageTypeObjC_plus_plus)
1987                         accessibility = eAccessNone;
1988
1989                     if (member_idx == 0 && !is_artificial && name && (strstr (name, "_vptr$") == name))
1990                     {
1991                         // Not all compilers will mark the vtable pointer
1992                         // member as artificial (llvm-gcc). We can't have
1993                         // the virtual members in our classes otherwise it
1994                         // throws off all child offsets since we end up
1995                         // having and extra pointer sized member in our
1996                         // class layouts.
1997                         is_artificial = true;
1998                     }
1999
2000                     // Handle static members
2001                     if (is_external && member_byte_offset == UINT32_MAX)
2002                     {
2003                         Type *var_type = ResolveTypeUID(encoding_uid);
2004
2005                         if (var_type)
2006                         {
2007                             if (accessibility == eAccessNone)
2008                                 accessibility = eAccessPublic;
2009                             class_clang_type.AddVariableToRecordType (name,
2010                                                                       var_type->GetClangLayoutType(),
2011                                                                       accessibility);
2012                         }
2013                         break;
2014                     }
2015
2016                     if (is_artificial == false)
2017                     {
2018                         Type *member_type = ResolveTypeUID(encoding_uid);
2019
2020                         clang::FieldDecl *field_decl = NULL;
2021                         if (tag == DW_TAG_member)
2022                         {
2023                             if (member_type)
2024                             {
2025                                 if (accessibility == eAccessNone)
2026                                     accessibility = default_accessibility;
2027                                 member_accessibilities.push_back(accessibility);
2028
2029                                 uint64_t field_bit_offset = (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8));
2030                                 if (bit_size > 0)
2031                                 {
2032
2033                                     BitfieldInfo this_field_info;
2034                                     this_field_info.bit_offset = field_bit_offset;
2035                                     this_field_info.bit_size = bit_size;
2036
2037                                     /////////////////////////////////////////////////////////////
2038                                     // How to locate a field given the DWARF debug information
2039                                     //
2040                                     // AT_byte_size indicates the size of the word in which the
2041                                     // bit offset must be interpreted.
2042                                     //
2043                                     // AT_data_member_location indicates the byte offset of the
2044                                     // word from the base address of the structure.
2045                                     //
2046                                     // AT_bit_offset indicates how many bits into the word
2047                                     // (according to the host endianness) the low-order bit of
2048                                     // the field starts.  AT_bit_offset can be negative.
2049                                     //
2050                                     // AT_bit_size indicates the size of the field in bits.
2051                                     /////////////////////////////////////////////////////////////
2052
2053                                     if (byte_size == 0)
2054                                         byte_size = member_type->GetByteSize();
2055
2056                                     if (GetObjectFile()->GetByteOrder() == eByteOrderLittle)
2057                                     {
2058                                         this_field_info.bit_offset += byte_size * 8;
2059                                         this_field_info.bit_offset -= (bit_offset + bit_size);
2060                                     }
2061                                     else
2062                                     {
2063                                         this_field_info.bit_offset += bit_offset;
2064                                     }
2065
2066                                     // Update the field bit offset we will report for layout
2067                                     field_bit_offset = this_field_info.bit_offset;
2068
2069                                     // If the member to be emitted did not start on a character boundary and there is
2070                                     // empty space between the last field and this one, then we need to emit an
2071                                     // anonymous member filling up the space up to its start.  There are three cases
2072                                     // here:
2073                                     //
2074                                     // 1 If the previous member ended on a character boundary, then we can emit an
2075                                     //   anonymous member starting at the most recent character boundary.
2076                                     //
2077                                     // 2 If the previous member did not end on a character boundary and the distance
2078                                     //   from the end of the previous member to the current member is less than a
2079                                     //   word width, then we can emit an anonymous member starting right after the
2080                                     //   previous member and right before this member.
2081                                     //
2082                                     // 3 If the previous member did not end on a character boundary and the distance
2083                                     //   from the end of the previous member to the current member is greater than
2084                                     //   or equal a word width, then we act as in Case 1.
2085
2086                                     const uint64_t character_width = 8;
2087                                     const uint64_t word_width = 32;
2088
2089                                     // Objective-C has invalid DW_AT_bit_offset values in older versions
2090                                     // of clang, so we have to be careful and only insert unnamed bitfields
2091                                     // if we have a new enough clang.
2092                                     bool detect_unnamed_bitfields = true;
2093
2094                                     if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus)
2095                                         detect_unnamed_bitfields = dwarf_cu->Supports_unnamed_objc_bitfields ();
2096
2097                                     if (detect_unnamed_bitfields)
2098                                     {
2099                                         BitfieldInfo anon_field_info;
2100
2101                                         if ((this_field_info.bit_offset % character_width) != 0) // not char aligned
2102                                         {
2103                                             uint64_t last_field_end = 0;
2104
2105                                             if (last_field_info.IsValid())
2106                                                 last_field_end = last_field_info.bit_offset + last_field_info.bit_size;
2107
2108                                             if (this_field_info.bit_offset != last_field_end)
2109                                             {
2110                                                 if (((last_field_end % character_width) == 0) ||                    // case 1
2111                                                     (this_field_info.bit_offset - last_field_end >= word_width))    // case 3
2112                                                 {
2113                                                     anon_field_info.bit_size = this_field_info.bit_offset % character_width;
2114                                                     anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size;
2115                                                 }
2116                                                 else                                                                // case 2
2117                                                 {
2118                                                     anon_field_info.bit_size = this_field_info.bit_offset - last_field_end;
2119                                                     anon_field_info.bit_offset = last_field_end;
2120                                                 }
2121                                             }
2122                                         }
2123
2124                                         if (anon_field_info.IsValid())
2125                                         {
2126                                             clang::FieldDecl *unnamed_bitfield_decl = class_clang_type.AddFieldToRecordType (NULL,
2127                                                                                                                              GetClangASTContext().GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, word_width),
2128                                                                                                                              accessibility,
2129                                                                                                                              anon_field_info.bit_size);
2130
2131                                             layout_info.field_offsets.insert(
2132                                                 std::make_pair(unnamed_bitfield_decl, anon_field_info.bit_offset));
2133                                         }
2134                                     }
2135                                     last_field_info = this_field_info;
2136                                 }
2137                                 else
2138                                 {
2139                                     last_field_info.Clear();
2140                                 }
2141
2142                                 ClangASTType member_clang_type = member_type->GetClangLayoutType();
2143
2144                                 {
2145                                     // Older versions of clang emit array[0] and array[1] in the same way (<rdar://problem/12566646>).
2146                                     // If the current field is at the end of the structure, then there is definitely no room for extra
2147                                     // elements and we override the type to array[0].
2148
2149                                     ClangASTType member_array_element_type;
2150                                     uint64_t member_array_size;
2151                                     bool member_array_is_incomplete;
2152
2153                                     if (member_clang_type.IsArrayType(&member_array_element_type,
2154                                                                       &member_array_size,
2155                                                                       &member_array_is_incomplete) &&
2156                                         !member_array_is_incomplete)
2157                                     {
2158                                         uint64_t parent_byte_size = parent_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, UINT64_MAX);
2159
2160                                         if (member_byte_offset >= parent_byte_size)
2161                                         {
2162                                             if (member_array_size != 1)
2163                                             {
2164                                                 GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which extends beyond the bounds of 0x%8.8" PRIx64,
2165                                                                                            MakeUserID(die->GetOffset()),
2166                                                                                            name,
2167                                                                                            encoding_uid,
2168                                                                                            MakeUserID(parent_die->GetOffset()));
2169                                             }
2170
2171                                             member_clang_type = GetClangASTContext().CreateArrayType(member_array_element_type, 0, false);
2172                                         }
2173                                     }
2174                                 }
2175
2176                                 field_decl = class_clang_type.AddFieldToRecordType (name,
2177                                                                                     member_clang_type,
2178                                                                                     accessibility,
2179                                                                                     bit_size);
2180
2181                                 GetClangASTContext().SetMetadataAsUserID (field_decl, MakeUserID(die->GetOffset()));
2182
2183                                 layout_info.field_offsets.insert(std::make_pair(field_decl, field_bit_offset));
2184                             }
2185                             else
2186                             {
2187                                 if (name)
2188                                     GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
2189                                                                                MakeUserID(die->GetOffset()),
2190                                                                                name,
2191                                                                                encoding_uid);
2192                                 else
2193                                     GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
2194                                                                                MakeUserID(die->GetOffset()),
2195                                                                                encoding_uid);
2196                             }
2197                         }
2198
2199                         if (prop_name != NULL)
2200                         {
2201                             clang::ObjCIvarDecl *ivar_decl = NULL;
2202
2203                             if (field_decl)
2204                             {
2205                                 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl);
2206                                 assert (ivar_decl != NULL);
2207                             }
2208
2209                             ClangASTMetadata metadata;
2210                             metadata.SetUserID (MakeUserID(die->GetOffset()));
2211                             delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type,
2212                                                                                      prop_name,
2213                                                                                      member_type->GetClangLayoutType(),
2214                                                                                      ivar_decl,
2215                                                                                      prop_setter_name,
2216                                                                                      prop_getter_name,
2217                                                                                      prop_attributes,
2218                                                                                      &metadata));
2219
2220                             if (ivar_decl)
2221                                 GetClangASTContext().SetMetadataAsUserID (ivar_decl, MakeUserID(die->GetOffset()));
2222                         }
2223                     }
2224                 }
2225                 ++member_idx;
2226             }
2227             break;
2228
2229         case DW_TAG_subprogram:
2230             // Let the type parsing code handle this one for us.
2231             member_function_dies.Append (die);
2232             break;
2233
2234         case DW_TAG_inheritance:
2235             {
2236                 is_a_class = true;
2237                 if (default_accessibility == eAccessNone)
2238                     default_accessibility = eAccessPrivate;
2239                 // TODO: implement DW_TAG_inheritance type parsing
2240                 DWARFDebugInfoEntry::Attributes attributes;
2241                 const size_t num_attributes = die->GetAttributes (this,
2242                                                                   dwarf_cu,
2243                                                                   fixed_form_sizes,
2244                                                                   attributes);
2245                 if (num_attributes > 0)
2246                 {
2247                     Declaration decl;
2248                     DWARFExpression location;
2249                     lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
2250                     AccessType accessibility = default_accessibility;
2251                     bool is_virtual = false;
2252                     bool is_base_of_class = true;
2253                     off_t member_byte_offset = 0;
2254                     uint32_t i;
2255                     for (i=0; i<num_attributes; ++i)
2256                     {
2257                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
2258                         DWARFFormValue form_value;
2259                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
2260                         {
2261                             switch (attr)
2262                             {
2263                             case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
2264                             case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
2265                             case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
2266                             case DW_AT_type:        encoding_uid = form_value.Reference(); break;
2267                             case DW_AT_data_member_location:
2268                                 if (form_value.BlockData())
2269                                 {
2270                                     Value initialValue(0);
2271                                     Value memberOffset(0);
2272                                     const DWARFDataExtractor& debug_info_data = get_debug_info_data();
2273                                     uint32_t block_length = form_value.Unsigned();
2274                                     uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
2275                                     if (DWARFExpression::Evaluate (NULL,
2276                                                                    NULL,
2277                                                                    NULL,
2278                                                                    NULL,
2279                                                                    module,
2280                                                                    debug_info_data,
2281                                                                    block_offset,
2282                                                                    block_length,
2283                                                                    eRegisterKindDWARF,
2284                                                                    &initialValue,
2285                                                                    memberOffset,
2286                                                                    NULL))
2287                                     {
2288                                         member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
2289                                     }
2290                                 }
2291                                 else
2292                                 {
2293                                     // With DWARF 3 and later, if the value is an integer constant,
2294                                     // this form value is the offset in bytes from the beginning
2295                                     // of the containing entity.
2296                                     member_byte_offset = form_value.Unsigned();
2297                                 }
2298                                 break;
2299
2300                             case DW_AT_accessibility:
2301                                 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
2302                                 break;
2303
2304                             case DW_AT_virtuality:
2305                                 is_virtual = form_value.Boolean();
2306                                 break;
2307
2308                             case DW_AT_sibling:
2309                                 break;
2310
2311                             default:
2312                                 break;
2313                             }
2314                         }
2315                     }
2316
2317                     Type *base_class_type = ResolveTypeUID(encoding_uid);
2318                     if (base_class_type == NULL)
2319                     {
2320                         GetObjectFile()->GetModule()->ReportError("0x%8.8x: DW_TAG_inheritance failed to resolve the base class at 0x%8.8" PRIx64 " from enclosing type 0x%8.8x. \nPlease file a bug and attach the file at the start of this error message",
2321                                                                   die->GetOffset(),
2322                                                                   encoding_uid,
2323                                                                   parent_die->GetOffset());
2324                         break;
2325                     }
2326
2327                     ClangASTType base_class_clang_type = base_class_type->GetClangFullType();
2328                     assert (base_class_clang_type);
2329                     if (class_language == eLanguageTypeObjC)
2330                     {
2331                         class_clang_type.SetObjCSuperClass(base_class_clang_type);
2332                     }
2333                     else
2334                     {
2335                         base_classes.push_back (base_class_clang_type.CreateBaseClassSpecifier (accessibility,
2336                                                                                                is_virtual,
2337                                                                                                is_base_of_class));
2338
2339                         if (is_virtual)
2340                         {
2341                             // Do not specify any offset for virtual inheritance. The DWARF produced by clang doesn't
2342                             // give us a constant offset, but gives us a DWARF expressions that requires an actual object
2343                             // in memory. the DW_AT_data_member_location for a virtual base class looks like:
2344                             //      DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, DW_OP_plus )
2345                             // Given this, there is really no valid response we can give to clang for virtual base
2346                             // class offsets, and this should eventually be removed from LayoutRecordType() in the external
2347                             // AST source in clang.
2348                         }
2349                         else
2350                         {
2351                             layout_info.base_offsets.insert(
2352                                 std::make_pair(base_class_clang_type.GetAsCXXRecordDecl(),
2353                                                clang::CharUnits::fromQuantity(member_byte_offset)));
2354                         }
2355                     }
2356                 }
2357             }
2358             break;
2359
2360         default:
2361             break;
2362         }
2363     }
2364
2365     return count;
2366 }
2367
2368
2369 clang::DeclContext*
2370 SymbolFileDWARF::GetClangDeclContextContainingTypeUID (lldb::user_id_t type_uid)
2371 {
2372     DWARFDebugInfo* debug_info = DebugInfo();
2373     if (debug_info && UserIDMatches(type_uid))
2374     {
2375         DWARFCompileUnitSP cu_sp;
2376         const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2377         if (die)
2378             return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
2379     }
2380     return NULL;
2381 }
2382
2383 clang::DeclContext*
2384 SymbolFileDWARF::GetClangDeclContextForTypeUID (const lldb_private::SymbolContext &sc, lldb::user_id_t type_uid)
2385 {
2386     if (UserIDMatches(type_uid))
2387         return GetClangDeclContextForDIEOffset (sc, type_uid);
2388     return NULL;
2389 }
2390
2391 Type*
2392 SymbolFileDWARF::ResolveTypeUID (lldb::user_id_t type_uid)
2393 {
2394     if (UserIDMatches(type_uid))
2395     {
2396         DWARFDebugInfo* debug_info = DebugInfo();
2397         if (debug_info)
2398         {
2399             DWARFCompileUnitSP cu_sp;
2400             const DWARFDebugInfoEntry* type_die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2401             const bool assert_not_being_parsed = true;
2402             return ResolveTypeUID (cu_sp.get(), type_die, assert_not_being_parsed);
2403         }
2404     }
2405     return NULL;
2406 }
2407
2408 Type*
2409 SymbolFileDWARF::ResolveTypeUID (DWARFCompileUnit* cu, const DWARFDebugInfoEntry* die, bool assert_not_being_parsed)
2410 {
2411     if (die != NULL)
2412     {
2413         Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
2414         if (log)
2415             GetObjectFile()->GetModule()->LogMessage (log,
2416                                                       "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s'",
2417                                                       die->GetOffset(),
2418                                                       DW_TAG_value_to_name(die->Tag()),
2419                                                       die->GetName(this, cu));
2420
2421         // We might be coming in in the middle of a type tree (a class
2422         // withing a class, an enum within a class), so parse any needed
2423         // parent DIEs before we get to this one...
2424         const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
2425         switch (decl_ctx_die->Tag())
2426         {
2427             case DW_TAG_structure_type:
2428             case DW_TAG_union_type:
2429             case DW_TAG_class_type:
2430             {
2431                 // Get the type, which could be a forward declaration
2432                 if (log)
2433                     GetObjectFile()->GetModule()->LogMessage (log,
2434                                                               "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent forward type for 0x%8.8x",
2435                                                               die->GetOffset(),
2436                                                               DW_TAG_value_to_name(die->Tag()),
2437                                                               die->GetName(this, cu),
2438                                                               decl_ctx_die->GetOffset());
2439 //
2440 //                Type *parent_type = ResolveTypeUID (cu, decl_ctx_die, assert_not_being_parsed);
2441 //                if (child_requires_parent_class_union_or_struct_to_be_completed(die->Tag()))
2442 //                {
2443 //                    if (log)
2444 //                        GetObjectFile()->GetModule()->LogMessage (log,
2445 //                                                                  "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent full type for 0x%8.8x since die is a function",
2446 //                                                                  die->GetOffset(),
2447 //                                                                  DW_TAG_value_to_name(die->Tag()),
2448 //                                                                  die->GetName(this, cu),
2449 //                                                                  decl_ctx_die->GetOffset());
2450 //                    // Ask the type to complete itself if it already hasn't since if we
2451 //                    // want a function (method or static) from a class, the class must
2452 //                    // create itself and add it's own methods and class functions.
2453 //                    if (parent_type)
2454 //                        parent_type->GetClangFullType();
2455 //                }
2456             }
2457             break;
2458
2459             default:
2460                 break;
2461         }
2462         return ResolveType (cu, die);
2463     }
2464     return NULL;
2465 }
2466
2467 // This function is used when SymbolFileDWARFDebugMap owns a bunch of
2468 // SymbolFileDWARF objects to detect if this DWARF file is the one that
2469 // can resolve a clang_type.
2470 bool
2471 SymbolFileDWARF::HasForwardDeclForClangType (const ClangASTType &clang_type)
2472 {
2473     ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
2474     const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
2475     return die != NULL;
2476 }
2477
2478
2479 bool
2480 SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (ClangASTType &clang_type)
2481 {
2482     // We have a struct/union/class/enum that needs to be fully resolved.
2483     ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
2484     const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
2485     if (die == NULL)
2486     {
2487         // We have already resolved this type...
2488         return true;
2489     }
2490     // Once we start resolving this type, remove it from the forward declaration
2491     // map in case anyone child members or other types require this type to get resolved.
2492     // The type will get resolved when all of the calls to SymbolFileDWARF::ResolveClangOpaqueTypeDefinition
2493     // are done.
2494     m_forward_decl_clang_type_to_die.erase (clang_type_no_qualifiers.GetOpaqueQualType());
2495
2496     // Disable external storage for this type so we don't get anymore
2497     // clang::ExternalASTSource queries for this type.
2498     clang_type.SetHasExternalStorage (false);
2499
2500     DWARFDebugInfo* debug_info = DebugInfo();
2501
2502     DWARFCompileUnit *dwarf_cu = debug_info->GetCompileUnitContainingDIE (die->GetOffset()).get();
2503     Type *type = m_die_to_type.lookup (die);
2504
2505     const dw_tag_t tag = die->Tag();
2506
2507     Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION));
2508     if (log)
2509         GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log,
2510                                                                   "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...",
2511                                                                   MakeUserID(die->GetOffset()),
2512                                                                   DW_TAG_value_to_name(tag),
2513                                                                   type->GetName().AsCString());
2514     assert (clang_type);
2515     DWARFDebugInfoEntry::Attributes attributes;
2516
2517     switch (tag)
2518     {
2519     case DW_TAG_structure_type:
2520     case DW_TAG_union_type:
2521     case DW_TAG_class_type:
2522         {
2523             LayoutInfo layout_info;
2524
2525             {
2526                 if (die->HasChildren())
2527                 {
2528                     LanguageType class_language = eLanguageTypeUnknown;
2529                     if (clang_type.IsObjCObjectOrInterfaceType())
2530                     {
2531                         class_language = eLanguageTypeObjC;
2532                         // For objective C we don't start the definition when
2533                         // the class is created.
2534                         clang_type.StartTagDeclarationDefinition ();
2535                     }
2536
2537                     int tag_decl_kind = -1;
2538                     AccessType default_accessibility = eAccessNone;
2539                     if (tag == DW_TAG_structure_type)
2540                     {
2541                         tag_decl_kind = clang::TTK_Struct;
2542                         default_accessibility = eAccessPublic;
2543                     }
2544                     else if (tag == DW_TAG_union_type)
2545                     {
2546                         tag_decl_kind = clang::TTK_Union;
2547                         default_accessibility = eAccessPublic;
2548                     }
2549                     else if (tag == DW_TAG_class_type)
2550                     {
2551                         tag_decl_kind = clang::TTK_Class;
2552                         default_accessibility = eAccessPrivate;
2553                     }
2554
2555                     SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2556                     std::vector<clang::CXXBaseSpecifier *> base_classes;
2557                     std::vector<int> member_accessibilities;
2558                     bool is_a_class = false;
2559                     // Parse members and base classes first
2560                     DWARFDIECollection member_function_dies;
2561
2562                     DelayedPropertyList delayed_properties;
2563                     ParseChildMembers (sc,
2564                                        dwarf_cu,
2565                                        die,
2566                                        clang_type,
2567                                        class_language,
2568                                        base_classes,
2569                                        member_accessibilities,
2570                                        member_function_dies,
2571                                        delayed_properties,
2572                                        default_accessibility,
2573                                        is_a_class,
2574                                        layout_info);
2575
2576                     // Now parse any methods if there were any...
2577                     size_t num_functions = member_function_dies.Size();
2578                     if (num_functions > 0)
2579                     {
2580                         for (size_t i=0; i<num_functions; ++i)
2581                         {
2582                             ResolveType(dwarf_cu, member_function_dies.GetDIEPtrAtIndex(i));
2583                         }
2584                     }
2585
2586                     if (class_language == eLanguageTypeObjC)
2587                     {
2588                         ConstString class_name (clang_type.GetTypeName());
2589                         if (class_name)
2590                         {
2591                             DIEArray method_die_offsets;
2592                             if (m_using_apple_tables)
2593                             {
2594                                 if (m_apple_objc_ap.get())
2595                                     m_apple_objc_ap->FindByName(class_name.GetCString(), method_die_offsets);
2596                             }
2597                             else
2598                             {
2599                                 if (!m_indexed)
2600                                     Index ();
2601
2602                                 m_objc_class_selectors_index.Find (class_name, method_die_offsets);
2603                             }
2604
2605                             if (!method_die_offsets.empty())
2606                             {
2607                                 DWARFDebugInfo* debug_info = DebugInfo();
2608
2609                                 DWARFCompileUnit* method_cu = NULL;
2610                                 const size_t num_matches = method_die_offsets.size();
2611                                 for (size_t i=0; i<num_matches; ++i)
2612                                 {
2613                                     const dw_offset_t die_offset = method_die_offsets[i];
2614                                     DWARFDebugInfoEntry *method_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &method_cu);
2615
2616                                     if (method_die)
2617                                         ResolveType (method_cu, method_die);
2618                                     else
2619                                     {
2620                                         if (m_using_apple_tables)
2621                                         {
2622                                             GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_objc accelerator table had bad die 0x%8.8x for '%s')\n",
2623                                                                                                        die_offset, class_name.GetCString());
2624                                         }
2625                                     }
2626                                 }
2627                             }
2628
2629                             for (DelayedPropertyList::iterator pi = delayed_properties.begin(), pe = delayed_properties.end();
2630                                  pi != pe;
2631                                  ++pi)
2632                                 pi->Finalize();
2633                         }
2634                     }
2635
2636                     // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we
2637                     // need to tell the clang type it is actually a class.
2638                     if (class_language != eLanguageTypeObjC)
2639                     {
2640                         if (is_a_class && tag_decl_kind != clang::TTK_Class)
2641                             clang_type.SetTagTypeKind (clang::TTK_Class);
2642                     }
2643
2644                     // Since DW_TAG_structure_type gets used for both classes
2645                     // and structures, we may need to set any DW_TAG_member
2646                     // fields to have a "private" access if none was specified.
2647                     // When we parsed the child members we tracked that actual
2648                     // accessibility value for each DW_TAG_member in the
2649                     // "member_accessibilities" array. If the value for the
2650                     // member is zero, then it was set to the "default_accessibility"
2651                     // which for structs was "public". Below we correct this
2652                     // by setting any fields to "private" that weren't correctly
2653                     // set.
2654                     if (is_a_class && !member_accessibilities.empty())
2655                     {
2656                         // This is a class and all members that didn't have
2657                         // their access specified are private.
2658                         clang_type.SetDefaultAccessForRecordFields (eAccessPrivate,
2659                                                                     &member_accessibilities.front(),
2660                                                                     member_accessibilities.size());
2661                     }
2662
2663                     if (!base_classes.empty())
2664                     {
2665                         // Make sure all base classes refer to complete types and not
2666                         // forward declarations. If we don't do this, clang will crash
2667                         // with an assertion in the call to clang_type.SetBaseClassesForClassType()
2668                         bool base_class_error = false;
2669                         for (auto &base_class : base_classes)
2670                         {
2671                             clang::TypeSourceInfo *type_source_info = base_class->getTypeSourceInfo();
2672                             if (type_source_info)
2673                             {
2674                                 ClangASTType base_class_type (GetClangASTContext().getASTContext(), type_source_info->getType());
2675                                 if (base_class_type.GetCompleteType() == false)
2676                                 {
2677                                     if (!base_class_error)
2678                                     {
2679                                         GetObjectFile()->GetModule()->ReportError ("DWARF DIE at 0x%8.8x for class '%s' has a base class '%s' that is a forward declaration, not a complete definition.\nPlease file a bug against the compiler and include the preprocessed output for %s",
2680                                                                                    die->GetOffset(),
2681                                                                                    die->GetName(this, dwarf_cu),
2682                                                                                    base_class_type.GetTypeName().GetCString(),
2683                                                                                    sc.comp_unit ? sc.comp_unit->GetPath().c_str() : "the source file");
2684                                     }
2685                                     // We have no choice other than to pretend that the base class
2686                                     // is complete. If we don't do this, clang will crash when we
2687                                     // call setBases() inside of "clang_type.SetBaseClassesForClassType()"
2688                                     // below. Since we provide layout assistance, all ivars in this
2689                                     // class and other classes will be fine, this is the best we can do
2690                                     // short of crashing.
2691                                     base_class_type.StartTagDeclarationDefinition ();
2692                                     base_class_type.CompleteTagDeclarationDefinition ();
2693                                 }
2694                             }
2695                         }
2696                         clang_type.SetBaseClassesForClassType (&base_classes.front(),
2697                                                                base_classes.size());
2698
2699                         // Clang will copy each CXXBaseSpecifier in "base_classes"
2700                         // so we have to free them all.
2701                         ClangASTType::DeleteBaseClassSpecifiers (&base_classes.front(),
2702                                                                  base_classes.size());
2703                     }
2704                 }
2705             }
2706
2707             clang_type.BuildIndirectFields ();
2708             clang_type.CompleteTagDeclarationDefinition ();
2709
2710             if (!layout_info.field_offsets.empty() ||
2711                 !layout_info.base_offsets.empty()  ||
2712                 !layout_info.vbase_offsets.empty() )
2713             {
2714                 if (type)
2715                     layout_info.bit_size = type->GetByteSize() * 8;
2716                 if (layout_info.bit_size == 0)
2717                     layout_info.bit_size = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, 0) * 8;
2718
2719                 clang::CXXRecordDecl *record_decl = clang_type.GetAsCXXRecordDecl();
2720                 if (record_decl)
2721                 {
2722                     if (log)
2723                     {
2724                         GetObjectFile()->GetModule()->LogMessage (log,
2725                                                                   "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) caching layout info for record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])",
2726                                                                   static_cast<void*>(clang_type.GetOpaqueQualType()),
2727                                                                   static_cast<void*>(record_decl),
2728                                                                   layout_info.bit_size,
2729                                                                   layout_info.alignment,
2730                                                                   static_cast<uint32_t>(layout_info.field_offsets.size()),
2731                                                                   static_cast<uint32_t>(layout_info.base_offsets.size()),
2732                                                                   static_cast<uint32_t>(layout_info.vbase_offsets.size()));
2733
2734                         uint32_t idx;
2735                         {
2736                             llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator pos,
2737                                 end = layout_info.field_offsets.end();
2738                             for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx)
2739                         {
2740                             GetObjectFile()->GetModule()->LogMessage(
2741                                 log, "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) field[%u] = "
2742                                      "{ bit_offset=%u, name='%s' }",
2743                                 static_cast<void *>(clang_type.GetOpaqueQualType()), idx,
2744                                 static_cast<uint32_t>(pos->second), pos->first->getNameAsString().c_str());
2745                         }
2746                         }
2747
2748                         {
2749                             llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos,
2750                                 base_end = layout_info.base_offsets.end();
2751                             for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end;
2752                                  ++base_pos, ++idx)
2753                             {
2754                                 GetObjectFile()->GetModule()->LogMessage(
2755                                     log, "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) base[%u] "
2756                                          "= { byte_offset=%u, name='%s' }",
2757                                     clang_type.GetOpaqueQualType(), idx, (uint32_t)base_pos->second.getQuantity(),
2758                                     base_pos->first->getNameAsString().c_str());
2759                             }
2760                         }
2761                         {
2762                             llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos,
2763                                 vbase_end = layout_info.vbase_offsets.end();
2764                             for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end;
2765                                  ++vbase_pos, ++idx)
2766                             {
2767                                 GetObjectFile()->GetModule()->LogMessage(
2768                                     log, "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) "
2769                                          "vbase[%u] = { byte_offset=%u, name='%s' }",
2770                                     static_cast<void *>(clang_type.GetOpaqueQualType()), idx,
2771                                     static_cast<uint32_t>(vbase_pos->second.getQuantity()),
2772                                     vbase_pos->first->getNameAsString().c_str());
2773                             }
2774                         }
2775                     }
2776                     m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
2777                 }
2778             }
2779         }
2780
2781         return (bool)clang_type;
2782
2783     case DW_TAG_enumeration_type:
2784         clang_type.StartTagDeclarationDefinition ();
2785         if (die->HasChildren())
2786         {
2787             SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2788             bool is_signed = false;
2789             clang_type.IsIntegerType(is_signed);
2790             ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), dwarf_cu, die);
2791         }
2792         clang_type.CompleteTagDeclarationDefinition ();
2793         return (bool)clang_type;
2794
2795     default:
2796         assert(false && "not a forward clang type decl!");
2797         break;
2798     }
2799     return false;
2800 }
2801
2802 Type*
2803 SymbolFileDWARF::ResolveType (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* type_die, bool assert_not_being_parsed)
2804 {
2805     if (type_die != NULL)
2806     {
2807         Type *type = m_die_to_type.lookup (type_die);
2808
2809         if (type == NULL)
2810             type = GetTypeForDIE (dwarf_cu, type_die).get();
2811
2812         if (assert_not_being_parsed)
2813         {
2814             if (type != DIE_IS_BEING_PARSED)
2815                 return type;
2816
2817             GetObjectFile()->GetModule()->ReportError ("Parsing a die that is being parsed die: 0x%8.8x: %s %s",
2818                                                        type_die->GetOffset(),
2819                                                        DW_TAG_value_to_name(type_die->Tag()),
2820                                                        type_die->GetName(this, dwarf_cu));
2821
2822         }
2823         else
2824             return type;
2825     }
2826     return NULL;
2827 }
2828
2829 CompileUnit*
2830 SymbolFileDWARF::GetCompUnitForDWARFCompUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
2831 {
2832     // Check if the symbol vendor already knows about this compile unit?
2833     if (dwarf_cu->GetUserData() == NULL)
2834     {
2835         // The symbol vendor doesn't know about this compile unit, we
2836         // need to parse and add it to the symbol vendor object.
2837         return ParseCompileUnit(dwarf_cu, cu_idx).get();
2838     }
2839     return (CompileUnit*)dwarf_cu->GetUserData();
2840 }
2841
2842 bool
2843 SymbolFileDWARF::GetFunction (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* func_die, SymbolContext& sc)
2844 {
2845     sc.Clear(false);
2846     // Check if the symbol vendor already knows about this compile unit?
2847     sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
2848
2849     sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(func_die->GetOffset())).get();
2850     if (sc.function == NULL)
2851         sc.function = ParseCompileUnitFunction(sc, dwarf_cu, func_die);
2852
2853     if (sc.function)
2854     {
2855         sc.module_sp = sc.function->CalculateSymbolContextModule();
2856         return true;
2857     }
2858
2859     return false;
2860 }
2861
2862 void
2863 SymbolFileDWARF::UpdateExternalModuleListIfNeeded()
2864 {
2865     if (m_fetched_external_modules)
2866         return;
2867     m_fetched_external_modules = true;
2868
2869     DWARFDebugInfo * debug_info = DebugInfo();
2870     debug_info->GetNumCompileUnits();
2871
2872     const uint32_t num_compile_units = GetNumCompileUnits();
2873     for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
2874     {
2875         DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
2876
2877         const DWARFDebugInfoEntry *die = dwarf_cu->GetCompileUnitDIEOnly();
2878         if (die && die->HasChildren() == false)
2879         {
2880             const uint64_t name_strp = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_name, UINT64_MAX);
2881             const uint64_t dwo_path_strp = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_GNU_dwo_name, UINT64_MAX);
2882
2883             if (name_strp != UINT64_MAX)
2884             {
2885                 if (m_external_type_modules.find(dwo_path_strp) == m_external_type_modules.end())
2886                 {
2887                     const char *name = get_debug_str_data().PeekCStr(name_strp);
2888                     const char *dwo_path = get_debug_str_data().PeekCStr(dwo_path_strp);
2889                     if (name || dwo_path)
2890                     {
2891                         ModuleSP module_sp;
2892                         if (dwo_path)
2893                         {
2894                             ModuleSpec dwo_module_spec;
2895                             dwo_module_spec.GetFileSpec().SetFile(dwo_path, false);
2896                             dwo_module_spec.GetArchitecture() = m_obj_file->GetModule()->GetArchitecture();
2897                             //printf ("Loading dwo = '%s'\n", dwo_path);
2898                             Error error = ModuleList::GetSharedModule (dwo_module_spec, module_sp, NULL, NULL, NULL);
2899                         }
2900
2901                         if (dwo_path_strp != LLDB_INVALID_UID)
2902                         {
2903                             m_external_type_modules[dwo_path_strp] = ClangModuleInfo { ConstString(name), module_sp };
2904                         }
2905                         else
2906                         {
2907                             // This hack should be removed promptly once clang emits both.
2908                             m_external_type_modules[name_strp] = ClangModuleInfo { ConstString(name), module_sp };
2909                         }
2910                     }
2911                 }
2912             }
2913         }
2914     }
2915 }
2916
2917 SymbolFileDWARF::GlobalVariableMap &
2918 SymbolFileDWARF::GetGlobalAranges()
2919 {
2920     if (!m_global_aranges_ap)
2921     {
2922         m_global_aranges_ap.reset (new GlobalVariableMap());
2923
2924         ModuleSP module_sp = GetObjectFile()->GetModule();
2925         if (module_sp)
2926         {
2927             const size_t num_cus = module_sp->GetNumCompileUnits();
2928             for (size_t i = 0; i < num_cus; ++i)
2929             {
2930                 CompUnitSP cu_sp = module_sp->GetCompileUnitAtIndex(i);
2931                 if (cu_sp)
2932                 {
2933                     VariableListSP globals_sp = cu_sp->GetVariableList(true);
2934                     if (globals_sp)
2935                     {
2936                         const size_t num_globals = globals_sp->GetSize();
2937                         for (size_t g = 0; g < num_globals; ++g)
2938                         {
2939                             VariableSP var_sp = globals_sp->GetVariableAtIndex(g);
2940                             if (var_sp && !var_sp->GetLocationIsConstantValueData())
2941                             {
2942                                 const DWARFExpression &location = var_sp->LocationExpression();
2943                                 Value location_result;
2944                                 Error error;
2945                                 if (location.Evaluate(NULL, NULL, NULL, LLDB_INVALID_ADDRESS, NULL, location_result, &error))
2946                                 {
2947                                     if (location_result.GetValueType() == Value::eValueTypeFileAddress)
2948                                     {
2949                                         lldb::addr_t file_addr = location_result.GetScalar().ULongLong();
2950                                         lldb::addr_t byte_size = 1;
2951                                         if (var_sp->GetType())
2952                                             byte_size = var_sp->GetType()->GetByteSize();
2953                                         m_global_aranges_ap->Append(GlobalVariableMap::Entry(file_addr, byte_size, var_sp.get()));
2954                                     }
2955                                 }
2956                             }
2957                         }
2958                     }
2959                 }
2960             }
2961         }
2962         m_global_aranges_ap->Sort();
2963     }
2964     return *m_global_aranges_ap;
2965 }
2966
2967
2968 uint32_t
2969 SymbolFileDWARF::ResolveSymbolContext (const Address& so_addr, uint32_t resolve_scope, SymbolContext& sc)
2970 {
2971     Timer scoped_timer(__PRETTY_FUNCTION__,
2972                        "SymbolFileDWARF::ResolveSymbolContext (so_addr = { section = %p, offset = 0x%" PRIx64 " }, resolve_scope = 0x%8.8x)",
2973                        static_cast<void*>(so_addr.GetSection().get()),
2974                        so_addr.GetOffset(), resolve_scope);
2975     uint32_t resolved = 0;
2976     if (resolve_scope & (   eSymbolContextCompUnit  |
2977                             eSymbolContextFunction  |
2978                             eSymbolContextBlock     |
2979                             eSymbolContextLineEntry |
2980                             eSymbolContextVariable  ))
2981     {
2982         lldb::addr_t file_vm_addr = so_addr.GetFileAddress();
2983
2984         DWARFDebugInfo* debug_info = DebugInfo();
2985         if (debug_info)
2986         {
2987             const dw_offset_t cu_offset = debug_info->GetCompileUnitAranges().FindAddress(file_vm_addr);
2988             if (cu_offset == DW_INVALID_OFFSET)
2989             {
2990                 // Global variables are not in the compile unit address ranges. The only way to
2991                 // currently find global variables is to iterate over the .debug_pubnames or the
2992                 // __apple_names table and find all items in there that point to DW_TAG_variable
2993                 // DIEs and then find the address that matches.
2994                 if (resolve_scope & eSymbolContextVariable)
2995                 {
2996                     GlobalVariableMap &map = GetGlobalAranges();
2997                     const GlobalVariableMap::Entry *entry = map.FindEntryThatContains(file_vm_addr);
2998                     if (entry && entry->data)
2999                     {
3000                         Variable *variable = entry->data;
3001                         SymbolContextScope *scc = variable->GetSymbolContextScope();
3002                         if (scc)
3003                         {
3004                             scc->CalculateSymbolContext(&sc);
3005                             sc.variable = variable;
3006                         }
3007                         return sc.GetResolvedMask();
3008                     }
3009                 }
3010             }
3011             else
3012             {
3013                 uint32_t cu_idx = DW_INVALID_INDEX;
3014                 DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnit(cu_offset, &cu_idx).get();
3015                 if (dwarf_cu)
3016                 {
3017                     sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
3018                     if (sc.comp_unit)
3019                     {
3020                         resolved |= eSymbolContextCompUnit;
3021
3022                         bool force_check_line_table = false;
3023                         if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
3024                         {
3025                             DWARFDebugInfoEntry *function_die = NULL;
3026                             DWARFDebugInfoEntry *block_die = NULL;
3027                             if (resolve_scope & eSymbolContextBlock)
3028                             {
3029                                 dwarf_cu->LookupAddress(file_vm_addr, &function_die, &block_die);
3030                             }
3031                             else
3032                             {
3033                                 dwarf_cu->LookupAddress(file_vm_addr, &function_die, NULL);
3034                             }
3035
3036                             if (function_die != NULL)
3037                             {
3038                                 sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
3039                                 if (sc.function == NULL)
3040                                     sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
3041                             }
3042                             else
3043                             {
3044                                 // We might have had a compile unit that had discontiguous
3045                                 // address ranges where the gaps are symbols that don't have
3046                                 // any debug info. Discontiguous compile unit address ranges
3047                                 // should only happen when there aren't other functions from
3048                                 // other compile units in these gaps. This helps keep the size
3049                                 // of the aranges down.
3050                                 force_check_line_table = true;
3051                             }
3052
3053                             if (sc.function != NULL)
3054                             {
3055                                 resolved |= eSymbolContextFunction;
3056
3057                                 if (resolve_scope & eSymbolContextBlock)
3058                                 {
3059                                     Block& block = sc.function->GetBlock (true);
3060
3061                                     if (block_die != NULL)
3062                                         sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
3063                                     else
3064                                         sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
3065                                     if (sc.block)
3066                                         resolved |= eSymbolContextBlock;
3067                                 }
3068                             }
3069                         }
3070
3071                         if ((resolve_scope & eSymbolContextLineEntry) || force_check_line_table)
3072                         {
3073                             LineTable *line_table = sc.comp_unit->GetLineTable();
3074                             if (line_table != NULL)
3075                             {
3076                                 // And address that makes it into this function should be in terms
3077                                 // of this debug file if there is no debug map, or it will be an
3078                                 // address in the .o file which needs to be fixed up to be in terms
3079                                 // of the debug map executable. Either way, calling FixupAddress()
3080                                 // will work for us.
3081                                 Address exe_so_addr (so_addr);
3082                                 if (FixupAddress(exe_so_addr))
3083                                 {
3084                                     if (line_table->FindLineEntryByAddress (exe_so_addr, sc.line_entry))
3085                                     {
3086                                         resolved |= eSymbolContextLineEntry;
3087                                     }
3088                                 }
3089                             }
3090                         }
3091
3092                         if (force_check_line_table && !(resolved & eSymbolContextLineEntry))
3093                         {
3094                             // We might have had a compile unit that had discontiguous
3095                             // address ranges where the gaps are symbols that don't have
3096                             // any debug info. Discontiguous compile unit address ranges
3097                             // should only happen when there aren't other functions from
3098                             // other compile units in these gaps. This helps keep the size
3099                             // of the aranges down.
3100                             sc.comp_unit = NULL;
3101                             resolved &= ~eSymbolContextCompUnit;
3102                         }
3103                     }
3104                     else
3105                     {
3106                         GetObjectFile()->GetModule()->ReportWarning ("0x%8.8x: compile unit %u failed to create a valid lldb_private::CompileUnit class.",
3107                                                                      cu_offset,
3108                                                                      cu_idx);
3109                     }
3110                 }
3111             }
3112         }
3113     }
3114     return resolved;
3115 }
3116
3117
3118
3119 uint32_t
3120 SymbolFileDWARF::ResolveSymbolContext(const FileSpec& file_spec, uint32_t line, bool check_inlines, uint32_t resolve_scope, SymbolContextList& sc_list)
3121 {
3122     const uint32_t prev_size = sc_list.GetSize();
3123     if (resolve_scope & eSymbolContextCompUnit)
3124     {
3125         DWARFDebugInfo* debug_info = DebugInfo();
3126         if (debug_info)
3127         {
3128             uint32_t cu_idx;
3129             DWARFCompileUnit* dwarf_cu = NULL;
3130
3131             for (cu_idx = 0; (dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx)) != NULL; ++cu_idx)
3132             {
3133                 CompileUnit *dc_cu = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
3134                 const bool full_match = (bool)file_spec.GetDirectory();
3135                 bool file_spec_matches_cu_file_spec = dc_cu != NULL && FileSpec::Equal(file_spec, *dc_cu, full_match);
3136                 if (check_inlines || file_spec_matches_cu_file_spec)
3137                 {
3138                     SymbolContext sc (m_obj_file->GetModule());
3139                     sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
3140                     if (sc.comp_unit)
3141                     {
3142                         uint32_t file_idx = UINT32_MAX;
3143
3144                         // If we are looking for inline functions only and we don't
3145                         // find it in the support files, we are done.
3146                         if (check_inlines)
3147                         {
3148                             file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
3149                             if (file_idx == UINT32_MAX)
3150                                 continue;
3151                         }
3152
3153                         if (line != 0)
3154                         {
3155                             LineTable *line_table = sc.comp_unit->GetLineTable();
3156
3157                             if (line_table != NULL && line != 0)
3158                             {
3159                                 // We will have already looked up the file index if
3160                                 // we are searching for inline entries.
3161                                 if (!check_inlines)
3162                                     file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
3163
3164                                 if (file_idx != UINT32_MAX)
3165                                 {
3166                                     uint32_t found_line;
3167                                     uint32_t line_idx = line_table->FindLineEntryIndexByFileIndex (0, file_idx, line, false, &sc.line_entry);
3168                                     found_line = sc.line_entry.line;
3169
3170                                     while (line_idx != UINT32_MAX)
3171                                     {
3172                                         sc.function = NULL;
3173                                         sc.block = NULL;
3174                                         if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
3175                                         {
3176                                             const lldb::addr_t file_vm_addr = sc.line_entry.range.GetBaseAddress().GetFileAddress();
3177                                             if (file_vm_addr != LLDB_INVALID_ADDRESS)
3178                                             {
3179                                                 DWARFDebugInfoEntry *function_die = NULL;
3180                                                 DWARFDebugInfoEntry *block_die = NULL;
3181                                                 dwarf_cu->LookupAddress(file_vm_addr, &function_die, resolve_scope & eSymbolContextBlock ? &block_die : NULL);
3182
3183                                                 if (function_die != NULL)
3184                                                 {
3185                                                     sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
3186                                                     if (sc.function == NULL)
3187                                                         sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
3188                                                 }
3189
3190                                                 if (sc.function != NULL)
3191                                                 {
3192                                                     Block& block = sc.function->GetBlock (true);
3193
3194                                                     if (block_die != NULL)
3195                                                         sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
3196                                                     else if (function_die != NULL)
3197                                                         sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
3198                                                 }
3199                                             }
3200                                         }
3201
3202                                         sc_list.Append(sc);
3203                                         line_idx = line_table->FindLineEntryIndexByFileIndex (line_idx + 1, file_idx, found_line, true, &sc.line_entry);
3204                                     }
3205                                 }
3206                             }
3207                             else if (file_spec_matches_cu_file_spec && !check_inlines)
3208                             {
3209                                 // only append the context if we aren't looking for inline call sites
3210                                 // by file and line and if the file spec matches that of the compile unit
3211                                 sc_list.Append(sc);
3212                             }
3213                         }
3214                         else if (file_spec_matches_cu_file_spec && !check_inlines)
3215                         {
3216                             // only append the context if we aren't looking for inline call sites
3217                             // by file and line and if the file spec matches that of the compile unit
3218                             sc_list.Append(sc);
3219                         }
3220
3221                         if (!check_inlines)
3222                             break;
3223                     }
3224                 }
3225             }
3226         }
3227     }
3228     return sc_list.GetSize() - prev_size;
3229 }
3230
3231 void
3232 SymbolFileDWARF::Index ()
3233 {
3234     if (m_indexed)
3235         return;
3236     m_indexed = true;
3237     Timer scoped_timer (__PRETTY_FUNCTION__,
3238                         "SymbolFileDWARF::Index (%s)",
3239                         GetObjectFile()->GetFileSpec().GetFilename().AsCString("<Unknown>"));
3240
3241     DWARFDebugInfo* debug_info = DebugInfo();
3242     if (debug_info)
3243     {
3244         uint32_t cu_idx = 0;
3245         const uint32_t num_compile_units = GetNumCompileUnits();
3246         for (cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
3247         {
3248             DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
3249
3250             bool clear_dies = dwarf_cu->ExtractDIEsIfNeeded (false) > 1;
3251
3252             dwarf_cu->Index (cu_idx,
3253                              m_function_basename_index,
3254                              m_function_fullname_index,
3255                              m_function_method_index,
3256                              m_function_selector_index,
3257                              m_objc_class_selectors_index,
3258                              m_global_index,
3259                              m_type_index,
3260                              m_namespace_index);
3261
3262             // Keep memory down by clearing DIEs if this generate function
3263             // caused them to be parsed
3264             if (clear_dies)
3265                 dwarf_cu->ClearDIEs (true);
3266         }
3267
3268         m_function_basename_index.Finalize();
3269         m_function_fullname_index.Finalize();
3270         m_function_method_index.Finalize();
3271         m_function_selector_index.Finalize();
3272         m_objc_class_selectors_index.Finalize();
3273         m_global_index.Finalize();
3274         m_type_index.Finalize();
3275         m_namespace_index.Finalize();
3276
3277 #if defined (ENABLE_DEBUG_PRINTF)
3278         StreamFile s(stdout, false);
3279         s.Printf ("DWARF index for '%s':",
3280                   GetObjectFile()->GetFileSpec().GetPath().c_str());
3281         s.Printf("\nFunction basenames:\n");    m_function_basename_index.Dump (&s);
3282         s.Printf("\nFunction fullnames:\n");    m_function_fullname_index.Dump (&s);
3283         s.Printf("\nFunction methods:\n");      m_function_method_index.Dump (&s);
3284         s.Printf("\nFunction selectors:\n");    m_function_selector_index.Dump (&s);
3285         s.Printf("\nObjective C class selectors:\n");    m_objc_class_selectors_index.Dump (&s);
3286         s.Printf("\nGlobals and statics:\n");   m_global_index.Dump (&s);
3287         s.Printf("\nTypes:\n");                 m_type_index.Dump (&s);
3288         s.Printf("\nNamepaces:\n");             m_namespace_index.Dump (&s);
3289 #endif
3290     }
3291 }
3292
3293 bool
3294 SymbolFileDWARF::NamespaceDeclMatchesThisSymbolFile (const ClangNamespaceDecl *namespace_decl)
3295 {
3296     if (namespace_decl == NULL)
3297     {
3298         // Invalid namespace decl which means we aren't matching only things
3299         // in this symbol file, so return true to indicate it matches this
3300         // symbol file.
3301         return true;
3302     }
3303
3304     clang::ASTContext *namespace_ast = namespace_decl->GetASTContext();
3305
3306     if (namespace_ast == NULL)
3307         return true;    // No AST in the "namespace_decl", return true since it
3308                         // could then match any symbol file, including this one
3309
3310     if (namespace_ast == GetClangASTContext().getASTContext())
3311         return true;    // The ASTs match, return true
3312
3313     // The namespace AST was valid, and it does not match...
3314     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3315
3316     if (log)
3317         GetObjectFile()->GetModule()->LogMessage(log, "Valid namespace does not match symbol file");
3318
3319     return false;
3320 }
3321
3322 bool
3323 SymbolFileDWARF::DIEIsInNamespace (const ClangNamespaceDecl *namespace_decl,
3324                                    DWARFCompileUnit* cu,
3325                                    const DWARFDebugInfoEntry* die)
3326 {
3327     // No namespace specified, so the answer is
3328     if (namespace_decl == NULL)
3329         return true;
3330
3331     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3332
3333     const DWARFDebugInfoEntry *decl_ctx_die = NULL;
3334     clang::DeclContext *die_clang_decl_ctx = GetClangDeclContextContainingDIE (cu, die, &decl_ctx_die);
3335     if (decl_ctx_die)
3336     {
3337         clang::NamespaceDecl *clang_namespace_decl = namespace_decl->GetNamespaceDecl();
3338
3339         if (clang_namespace_decl)
3340         {
3341             if (decl_ctx_die->Tag() != DW_TAG_namespace)
3342             {
3343                 if (log)
3344                     GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent is not a namespace");
3345                 return false;
3346             }
3347
3348             if (clang_namespace_decl == die_clang_decl_ctx)
3349                 return true;
3350             else
3351                 return false;
3352         }
3353         else
3354         {
3355             // We have a namespace_decl that was not NULL but it contained
3356             // a NULL "clang::NamespaceDecl", so this means the global namespace
3357             // So as long the contained decl context DIE isn't a namespace
3358             // we should be ok.
3359             if (decl_ctx_die->Tag() != DW_TAG_namespace)
3360                 return true;
3361         }
3362     }
3363
3364     if (log)
3365         GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent doesn't exist");
3366
3367     return false;
3368 }
3369 uint32_t
3370 SymbolFileDWARF::FindGlobalVariables (const ConstString &name, const lldb_private::ClangNamespaceDecl *namespace_decl, bool append, uint32_t max_matches, VariableList& variables)
3371 {
3372     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3373
3374     if (log)
3375         GetObjectFile()->GetModule()->LogMessage (log,
3376                                                   "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables)",
3377                                                   name.GetCString(),
3378                                                   static_cast<const void*>(namespace_decl),
3379                                                   append, max_matches);
3380
3381     if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3382         return 0;
3383
3384     DWARFDebugInfo* info = DebugInfo();
3385     if (info == NULL)
3386         return 0;
3387
3388     // If we aren't appending the results to this list, then clear the list
3389     if (!append)
3390         variables.Clear();
3391
3392     // Remember how many variables are in the list before we search in case
3393     // we are appending the results to a variable list.
3394     const uint32_t original_size = variables.GetSize();
3395
3396     DIEArray die_offsets;
3397
3398     if (m_using_apple_tables)
3399     {
3400         if (m_apple_names_ap.get())
3401         {
3402             const char *name_cstr = name.GetCString();
3403             llvm::StringRef basename;
3404             llvm::StringRef context;
3405
3406             if (!CPPLanguageRuntime::ExtractContextAndIdentifier(name_cstr, context, basename))
3407                 basename = name_cstr;
3408
3409             m_apple_names_ap->FindByName (basename.data(), die_offsets);
3410         }
3411     }
3412     else
3413     {
3414         // Index the DWARF if we haven't already
3415         if (!m_indexed)
3416             Index ();
3417
3418         m_global_index.Find (name, die_offsets);
3419     }
3420
3421     const size_t num_die_matches = die_offsets.size();
3422     if (num_die_matches)
3423     {
3424         SymbolContext sc;
3425         sc.module_sp = m_obj_file->GetModule();
3426         assert (sc.module_sp);
3427
3428         DWARFDebugInfo* debug_info = DebugInfo();
3429         DWARFCompileUnit* dwarf_cu = NULL;
3430         const DWARFDebugInfoEntry* die = NULL;
3431         bool done = false;
3432         for (size_t i=0; i<num_die_matches && !done; ++i)
3433         {
3434             const dw_offset_t die_offset = die_offsets[i];
3435             die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3436
3437             if (die)
3438             {
3439                 switch (die->Tag())
3440                 {
3441                     default:
3442                     case DW_TAG_subprogram:
3443                     case DW_TAG_inlined_subroutine:
3444                     case DW_TAG_try_block:
3445                     case DW_TAG_catch_block:
3446                         break;
3447
3448                     case DW_TAG_variable:
3449                         {
3450                             sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3451
3452                             if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3453                                 continue;
3454
3455                             ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3456
3457                             if (variables.GetSize() - original_size >= max_matches)
3458                                 done = true;
3459                         }
3460                         break;
3461                 }
3462             }
3463             else
3464             {
3465                 if (m_using_apple_tables)
3466                 {
3467                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')\n",
3468                                                                                die_offset, name.GetCString());
3469                 }
3470             }
3471         }
3472     }
3473
3474     // Return the number of variable that were appended to the list
3475     const uint32_t num_matches = variables.GetSize() - original_size;
3476     if (log && num_matches > 0)
3477     {
3478         GetObjectFile()->GetModule()->LogMessage (log,
3479                                                   "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables) => %u",
3480                                                   name.GetCString(),
3481                                                   static_cast<const void*>(namespace_decl),
3482                                                   append, max_matches,
3483                                                   num_matches);
3484     }
3485     return num_matches;
3486 }
3487
3488 uint32_t
3489 SymbolFileDWARF::FindGlobalVariables(const RegularExpression& regex, bool append, uint32_t max_matches, VariableList& variables)
3490 {
3491     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3492
3493     if (log)
3494     {
3495         GetObjectFile()->GetModule()->LogMessage (log,
3496                                                   "SymbolFileDWARF::FindGlobalVariables (regex=\"%s\", append=%u, max_matches=%u, variables)",
3497                                                   regex.GetText(), append,
3498                                                   max_matches);
3499     }
3500
3501     DWARFDebugInfo* info = DebugInfo();
3502     if (info == NULL)
3503         return 0;
3504
3505     // If we aren't appending the results to this list, then clear the list
3506     if (!append)
3507         variables.Clear();
3508
3509     // Remember how many variables are in the list before we search in case
3510     // we are appending the results to a variable list.
3511     const uint32_t original_size = variables.GetSize();
3512
3513     DIEArray die_offsets;
3514
3515     if (m_using_apple_tables)
3516     {
3517         if (m_apple_names_ap.get())
3518         {
3519             DWARFMappedHash::DIEInfoArray hash_data_array;
3520             if (m_apple_names_ap->AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3521                 DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3522         }
3523     }
3524     else
3525     {
3526         // Index the DWARF if we haven't already
3527         if (!m_indexed)
3528             Index ();
3529
3530         m_global_index.Find (regex, die_offsets);
3531     }
3532
3533     SymbolContext sc;
3534     sc.module_sp = m_obj_file->GetModule();
3535     assert (sc.module_sp);
3536
3537     DWARFCompileUnit* dwarf_cu = NULL;
3538     const DWARFDebugInfoEntry* die = NULL;
3539     const size_t num_matches = die_offsets.size();
3540     if (num_matches)
3541     {
3542         DWARFDebugInfo* debug_info = DebugInfo();
3543         for (size_t i=0; i<num_matches; ++i)
3544         {
3545             const dw_offset_t die_offset = die_offsets[i];
3546             die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3547
3548             if (die)
3549             {
3550                 sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3551
3552                 ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3553
3554                 if (variables.GetSize() - original_size >= max_matches)
3555                     break;
3556             }
3557             else
3558             {
3559                 if (m_using_apple_tables)
3560                 {
3561                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for regex '%s')\n",
3562                                                                                die_offset, regex.GetText());
3563                 }
3564             }
3565         }
3566     }
3567
3568     // Return the number of variable that were appended to the list
3569     return variables.GetSize() - original_size;
3570 }
3571
3572
3573 bool
3574 SymbolFileDWARF::ResolveFunction (dw_offset_t die_offset,
3575                                   DWARFCompileUnit *&dwarf_cu,
3576                                   bool include_inlines,
3577                                   SymbolContextList& sc_list)
3578 {
3579     const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3580     return ResolveFunction (dwarf_cu, die, include_inlines, sc_list);
3581 }
3582
3583
3584 bool
3585 SymbolFileDWARF::ResolveFunction (DWARFCompileUnit *cu,
3586                                   const DWARFDebugInfoEntry *die,
3587                                   bool include_inlines,
3588                                   SymbolContextList& sc_list)
3589 {
3590     SymbolContext sc;
3591
3592     if (die == NULL)
3593         return false;
3594
3595     // If we were passed a die that is not a function, just return false...
3596     if (! (die->Tag() == DW_TAG_subprogram || (include_inlines && die->Tag() == DW_TAG_inlined_subroutine)))
3597         return false;
3598
3599     const DWARFDebugInfoEntry* inlined_die = NULL;
3600     if (die->Tag() == DW_TAG_inlined_subroutine)
3601     {
3602         inlined_die = die;
3603
3604         while ((die = die->GetParent()) != NULL)
3605         {
3606             if (die->Tag() == DW_TAG_subprogram)
3607                 break;
3608         }
3609     }
3610     assert (die && die->Tag() == DW_TAG_subprogram);
3611     if (GetFunction (cu, die, sc))
3612     {
3613         Address addr;
3614         // Parse all blocks if needed
3615         if (inlined_die)
3616         {
3617             Block &function_block = sc.function->GetBlock (true);
3618             sc.block = function_block.FindBlockByID (MakeUserID(inlined_die->GetOffset()));
3619             if (sc.block == NULL)
3620                 sc.block = function_block.FindBlockByID (inlined_die->GetOffset());
3621             if (sc.block == NULL || sc.block->GetStartAddress (addr) == false)
3622                 addr.Clear();
3623         }
3624         else
3625         {
3626             sc.block = NULL;
3627             addr = sc.function->GetAddressRange().GetBaseAddress();
3628         }
3629
3630         if (addr.IsValid())
3631         {
3632             sc_list.Append(sc);
3633             return true;
3634         }
3635     }
3636
3637     return false;
3638 }
3639
3640 void
3641 SymbolFileDWARF::FindFunctions (const ConstString &name,
3642                                 const NameToDIE &name_to_die,
3643                                 bool include_inlines,
3644                                 SymbolContextList& sc_list)
3645 {
3646     DIEArray die_offsets;
3647     if (name_to_die.Find (name, die_offsets))
3648     {
3649         ParseFunctions (die_offsets, include_inlines, sc_list);
3650     }
3651 }
3652
3653
3654 void
3655 SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
3656                                 const NameToDIE &name_to_die,
3657                                 bool include_inlines,
3658                                 SymbolContextList& sc_list)
3659 {
3660     DIEArray die_offsets;
3661     if (name_to_die.Find (regex, die_offsets))
3662     {
3663         ParseFunctions (die_offsets, include_inlines, sc_list);
3664     }
3665 }
3666
3667
3668 void
3669 SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
3670                                 const DWARFMappedHash::MemoryTable &memory_table,
3671                                 bool include_inlines,
3672                                 SymbolContextList& sc_list)
3673 {
3674     DIEArray die_offsets;
3675     DWARFMappedHash::DIEInfoArray hash_data_array;
3676     if (memory_table.AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3677     {
3678         DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3679         ParseFunctions (die_offsets, include_inlines, sc_list);
3680     }
3681 }
3682
3683 void
3684 SymbolFileDWARF::ParseFunctions (const DIEArray &die_offsets,
3685                                  bool include_inlines,
3686                                  SymbolContextList& sc_list)
3687 {
3688     const size_t num_matches = die_offsets.size();
3689     if (num_matches)
3690     {
3691         DWARFCompileUnit* dwarf_cu = NULL;
3692         for (size_t i=0; i<num_matches; ++i)
3693         {
3694             const dw_offset_t die_offset = die_offsets[i];
3695             ResolveFunction (die_offset, dwarf_cu, include_inlines, sc_list);
3696         }
3697     }
3698 }
3699
3700 bool
3701 SymbolFileDWARF::FunctionDieMatchesPartialName (const DWARFDebugInfoEntry* die,
3702                                                 const DWARFCompileUnit *dwarf_cu,
3703                                                 uint32_t name_type_mask,
3704                                                 const char *partial_name,
3705                                                 const char *base_name_start,
3706                                                 const char *base_name_end)
3707 {
3708     // If we are looking only for methods, throw away all the ones that are or aren't in C++ classes:
3709     if (name_type_mask == eFunctionNameTypeMethod || name_type_mask == eFunctionNameTypeBase)
3710     {
3711         clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIEOffset(die->GetOffset());
3712         if (!containing_decl_ctx)
3713             return false;
3714
3715         bool is_cxx_method = DeclKindIsCXXClass(containing_decl_ctx->getDeclKind());
3716
3717         if (name_type_mask == eFunctionNameTypeMethod)
3718         {
3719             if (is_cxx_method == false)
3720                 return false;
3721         }
3722
3723         if (name_type_mask == eFunctionNameTypeBase)
3724         {
3725             if (is_cxx_method == true)
3726                 return false;
3727         }
3728     }
3729
3730     // Now we need to check whether the name we got back for this type matches the extra specifications
3731     // that were in the name we're looking up:
3732     if (base_name_start != partial_name || *base_name_end != '\0')
3733     {
3734         // First see if the stuff to the left matches the full name.  To do that let's see if
3735         // we can pull out the mips linkage name attribute:
3736
3737         Mangled best_name;
3738         DWARFDebugInfoEntry::Attributes attributes;
3739         DWARFFormValue form_value;
3740         die->GetAttributes(this, dwarf_cu, NULL, attributes);
3741         uint32_t idx = attributes.FindAttributeIndex(DW_AT_MIPS_linkage_name);
3742         if (idx == UINT32_MAX)
3743             idx = attributes.FindAttributeIndex(DW_AT_linkage_name);
3744         if (idx != UINT32_MAX)
3745         {
3746             if (attributes.ExtractFormValueAtIndex(this, idx, form_value))
3747             {
3748                 const char *mangled_name = form_value.AsCString(&get_debug_str_data());
3749                 if (mangled_name)
3750                     best_name.SetValue (ConstString(mangled_name), true);
3751             }
3752         }
3753
3754         if (!best_name)
3755         {
3756             idx = attributes.FindAttributeIndex(DW_AT_name);
3757             if (idx != UINT32_MAX && attributes.ExtractFormValueAtIndex(this, idx, form_value))
3758             {
3759                 const char *name = form_value.AsCString(&get_debug_str_data());
3760                 best_name.SetValue (ConstString(name), false);
3761             }
3762         }
3763
3764         if (best_name.GetDemangledName())
3765         {
3766             const char *demangled = best_name.GetDemangledName().GetCString();
3767             if (demangled)
3768             {
3769                 std::string name_no_parens(partial_name, base_name_end - partial_name);
3770                 const char *partial_in_demangled = strstr (demangled, name_no_parens.c_str());
3771                 if (partial_in_demangled == NULL)
3772                     return false;
3773                 else
3774                 {
3775                     // Sort out the case where our name is something like "Process::Destroy" and the match is
3776                     // "SBProcess::Destroy" - that shouldn't be a match.  We should really always match on
3777                     // namespace boundaries...
3778
3779                     if (partial_name[0] == ':'  && partial_name[1] == ':')
3780                     {
3781                         // The partial name was already on a namespace boundary so all matches are good.
3782                         return true;
3783                     }
3784                     else if (partial_in_demangled == demangled)
3785                     {
3786                         // They both start the same, so this is an good match.
3787                         return true;
3788                     }
3789                     else
3790                     {
3791                         if (partial_in_demangled - demangled == 1)
3792                         {
3793                             // Only one character difference, can't be a namespace boundary...
3794                             return false;
3795                         }
3796                         else if (*(partial_in_demangled - 1) == ':' && *(partial_in_demangled - 2) == ':')
3797                         {
3798                             // We are on a namespace boundary, so this is also good.
3799                             return true;
3800                         }
3801                         else
3802                             return false;
3803                     }
3804                 }
3805             }
3806         }
3807     }
3808
3809     return true;
3810 }
3811
3812 uint32_t
3813 SymbolFileDWARF::FindFunctions (const ConstString &name,
3814                                 const lldb_private::ClangNamespaceDecl *namespace_decl,
3815                                 uint32_t name_type_mask,
3816                                 bool include_inlines,
3817                                 bool append,
3818                                 SymbolContextList& sc_list)
3819 {
3820     Timer scoped_timer (__PRETTY_FUNCTION__,
3821                         "SymbolFileDWARF::FindFunctions (name = '%s')",
3822                         name.AsCString());
3823
3824     // eFunctionNameTypeAuto should be pre-resolved by a call to Module::PrepareForFunctionNameLookup()
3825     assert ((name_type_mask & eFunctionNameTypeAuto) == 0);
3826
3827     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3828
3829     if (log)
3830     {
3831         GetObjectFile()->GetModule()->LogMessage (log,
3832                                                   "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list)",
3833                                                   name.GetCString(),
3834                                                   name_type_mask,
3835                                                   append);
3836     }
3837
3838     // If we aren't appending the results to this list, then clear the list
3839     if (!append)
3840         sc_list.Clear();
3841
3842     if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3843         return 0;
3844
3845     // If name is empty then we won't find anything.
3846     if (name.IsEmpty())
3847         return 0;
3848
3849     // Remember how many sc_list are in the list before we search in case
3850     // we are appending the results to a variable list.
3851
3852     const char *name_cstr = name.GetCString();
3853
3854     const uint32_t original_size = sc_list.GetSize();
3855
3856     DWARFDebugInfo* info = DebugInfo();
3857     if (info == NULL)
3858         return 0;
3859
3860     DWARFCompileUnit *dwarf_cu = NULL;
3861     std::set<const DWARFDebugInfoEntry *> resolved_dies;
3862     if (m_using_apple_tables)
3863     {
3864         if (m_apple_names_ap.get())
3865         {
3866
3867             DIEArray die_offsets;
3868
3869             uint32_t num_matches = 0;
3870
3871             if (name_type_mask & eFunctionNameTypeFull)
3872             {
3873                 // If they asked for the full name, match what they typed.  At some point we may
3874                 // want to canonicalize this (strip double spaces, etc.  For now, we just add all the
3875                 // dies that we find by exact match.
3876                 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3877                 for (uint32_t i = 0; i < num_matches; i++)
3878                 {
3879                     const dw_offset_t die_offset = die_offsets[i];
3880                     const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3881                     if (die)
3882                     {
3883                         if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3884                             continue;
3885
3886                         if (resolved_dies.find(die) == resolved_dies.end())
3887                         {
3888                             if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
3889                                 resolved_dies.insert(die);
3890                         }
3891                     }
3892                     else
3893                     {
3894                         GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3895                                                                                    die_offset, name_cstr);
3896                     }
3897                 }
3898             }
3899
3900             if (name_type_mask & eFunctionNameTypeSelector)
3901             {
3902                 if (namespace_decl && *namespace_decl)
3903                     return 0; // no selectors in namespaces
3904
3905                 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3906                 // Now make sure these are actually ObjC methods.  In this case we can simply look up the name,
3907                 // and if it is an ObjC method name, we're good.
3908
3909                 for (uint32_t i = 0; i < num_matches; i++)
3910                 {
3911                     const dw_offset_t die_offset = die_offsets[i];
3912                     const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3913                     if (die)
3914                     {
3915                         const char *die_name = die->GetName(this, dwarf_cu);
3916                         if (ObjCLanguageRuntime::IsPossibleObjCMethodName(die_name))
3917                         {
3918                             if (resolved_dies.find(die) == resolved_dies.end())
3919                             {
3920                                 if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
3921                                     resolved_dies.insert(die);
3922                             }
3923                         }
3924                     }
3925                     else
3926                     {
3927                         GetObjectFile()->GetModule()->ReportError ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3928                                                                    die_offset, name_cstr);
3929                     }
3930                 }
3931                 die_offsets.clear();
3932             }
3933
3934             if (((name_type_mask & eFunctionNameTypeMethod) && !namespace_decl) || name_type_mask & eFunctionNameTypeBase)
3935             {
3936                 // The apple_names table stores just the "base name" of C++ methods in the table.  So we have to
3937                 // extract the base name, look that up, and if there is any other information in the name we were
3938                 // passed in we have to post-filter based on that.
3939
3940                 // FIXME: Arrange the logic above so that we don't calculate the base name twice:
3941                 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3942
3943                 for (uint32_t i = 0; i < num_matches; i++)
3944                 {
3945                     const dw_offset_t die_offset = die_offsets[i];
3946                     const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3947                     if (die)
3948                     {
3949                         if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3950                             continue;
3951
3952                         // If we get to here, the die is good, and we should add it:
3953                         if (resolved_dies.find(die) == resolved_dies.end())
3954                         if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
3955                         {
3956                             bool keep_die = true;
3957                             if ((name_type_mask & (eFunctionNameTypeBase|eFunctionNameTypeMethod)) != (eFunctionNameTypeBase|eFunctionNameTypeMethod))
3958                             {
3959                                 // We are looking for either basenames or methods, so we need to
3960                                 // trim out the ones we won't want by looking at the type
3961                                 SymbolContext sc;
3962                                 if (sc_list.GetLastContext(sc))
3963                                 {
3964                                     if (sc.block)
3965                                     {
3966                                         // We have an inlined function
3967                                     }
3968                                     else if (sc.function)
3969                                     {
3970                                         Type *type = sc.function->GetType();
3971
3972                                         if (type)
3973                                         {
3974                                             clang::DeclContext* decl_ctx = GetClangDeclContextContainingTypeUID (type->GetID());
3975                                             if (decl_ctx->isRecord())
3976                                             {
3977                                                 if (name_type_mask & eFunctionNameTypeBase)
3978                                                 {
3979                                                     sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3980                                                     keep_die = false;
3981                                                 }
3982                                             }
3983                                             else
3984                                             {
3985                                                 if (name_type_mask & eFunctionNameTypeMethod)
3986                                                 {
3987                                                     sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3988                                                     keep_die = false;
3989                                                 }
3990                                             }
3991                                         }
3992                                         else
3993                                         {
3994                                             GetObjectFile()->GetModule()->ReportWarning ("function at die offset 0x%8.8x had no function type",
3995                                                                                          die_offset);
3996                                         }
3997                                     }
3998                                 }
3999                             }
4000                             if (keep_die)
4001                                 resolved_dies.insert(die);
4002                         }
4003                     }
4004                     else
4005                     {
4006                         GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
4007                                                                                    die_offset, name_cstr);
4008                     }
4009                 }
4010                 die_offsets.clear();
4011             }
4012         }
4013     }
4014     else
4015     {
4016
4017         // Index the DWARF if we haven't already
4018         if (!m_indexed)
4019             Index ();
4020
4021         if (name_type_mask & eFunctionNameTypeFull)
4022         {
4023             FindFunctions (name, m_function_fullname_index, include_inlines, sc_list);
4024
4025             // FIXME Temporary workaround for global/anonymous namespace
4026             // functions debugging FreeBSD and Linux binaries.
4027             // If we didn't find any functions in the global namespace try
4028             // looking in the basename index but ignore any returned
4029             // functions that have a namespace but keep functions which
4030             // have an anonymous namespace
4031             // TODO: The arch in the object file isn't correct for MSVC
4032             // binaries on windows, we should find a way to make it
4033             // correct and handle those symbols as well.
4034             if (sc_list.GetSize() == 0)
4035             {
4036                 ArchSpec arch;
4037                 if (!namespace_decl &&
4038                     GetObjectFile()->GetArchitecture(arch) &&
4039                     (arch.GetTriple().isOSFreeBSD() || arch.GetTriple().isOSLinux() ||
4040                      arch.GetMachine() == llvm::Triple::hexagon))
4041                 {
4042                     SymbolContextList temp_sc_list;
4043                     FindFunctions (name, m_function_basename_index, include_inlines, temp_sc_list);
4044                     SymbolContext sc;
4045                     for (uint32_t i = 0; i < temp_sc_list.GetSize(); i++)
4046                     {
4047                         if (temp_sc_list.GetContextAtIndex(i, sc))
4048                         {
4049                             ConstString mangled_name = sc.GetFunctionName(Mangled::ePreferMangled);
4050                             ConstString demangled_name = sc.GetFunctionName(Mangled::ePreferDemangled);
4051                             // Mangled names on Linux and FreeBSD are of the form:
4052                             // _ZN18function_namespace13function_nameEv.
4053                             if (strncmp(mangled_name.GetCString(), "_ZN", 3) ||
4054                                 !strncmp(demangled_name.GetCString(), "(anonymous namespace)", 21))
4055                             {
4056                                 sc_list.Append(sc);
4057                             }
4058                         }
4059                     }
4060                 }
4061             }
4062         }
4063         DIEArray die_offsets;
4064         DWARFCompileUnit *dwarf_cu = NULL;
4065
4066         if (name_type_mask & eFunctionNameTypeBase)
4067         {
4068             uint32_t num_base = m_function_basename_index.Find(name, die_offsets);
4069             for (uint32_t i = 0; i < num_base; i++)
4070             {
4071                 const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
4072                 if (die)
4073                 {
4074                     if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
4075                         continue;
4076
4077                     // If we get to here, the die is good, and we should add it:
4078                     if (resolved_dies.find(die) == resolved_dies.end())
4079                     {
4080                         if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
4081                             resolved_dies.insert(die);
4082                     }
4083                 }
4084             }
4085             die_offsets.clear();
4086         }
4087
4088         if (name_type_mask & eFunctionNameTypeMethod)
4089         {
4090             if (namespace_decl && *namespace_decl)
4091                 return 0; // no methods in namespaces
4092
4093             uint32_t num_base = m_function_method_index.Find(name, die_offsets);
4094             {
4095                 for (uint32_t i = 0; i < num_base; i++)
4096                 {
4097                     const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
4098                     if (die)
4099                     {
4100                         // If we get to here, the die is good, and we should add it:
4101                         if (resolved_dies.find(die) == resolved_dies.end())
4102                         {
4103                             if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
4104                                 resolved_dies.insert(die);
4105                         }
4106                     }
4107                 }
4108             }
4109             die_offsets.clear();
4110         }
4111
4112         if ((name_type_mask & eFunctionNameTypeSelector) && (!namespace_decl || !*namespace_decl))
4113         {
4114             FindFunctions (name, m_function_selector_index, include_inlines, sc_list);
4115         }
4116
4117     }
4118
4119     // Return the number of variable that were appended to the list
4120     const uint32_t num_matches = sc_list.GetSize() - original_size;
4121
4122     if (log && num_matches > 0)
4123     {
4124         GetObjectFile()->GetModule()->LogMessage (log,
4125                                                   "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, include_inlines=%d, append=%u, sc_list) => %u",
4126                                                   name.GetCString(),
4127                                                   name_type_mask,
4128                                                   include_inlines,
4129                                                   append,
4130                                                   num_matches);
4131     }
4132     return num_matches;
4133 }
4134
4135 uint32_t
4136 SymbolFileDWARF::FindFunctions(const RegularExpression& regex, bool include_inlines, bool append, SymbolContextList& sc_list)
4137 {
4138     Timer scoped_timer (__PRETTY_FUNCTION__,
4139                         "SymbolFileDWARF::FindFunctions (regex = '%s')",
4140                         regex.GetText());
4141
4142     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
4143
4144     if (log)
4145     {
4146         GetObjectFile()->GetModule()->LogMessage (log,
4147                                                   "SymbolFileDWARF::FindFunctions (regex=\"%s\", append=%u, sc_list)",
4148                                                   regex.GetText(),
4149                                                   append);
4150     }
4151
4152
4153     // If we aren't appending the results to this list, then clear the list
4154     if (!append)
4155         sc_list.Clear();
4156
4157     // Remember how many sc_list are in the list before we search in case
4158     // we are appending the results to a variable list.
4159     uint32_t original_size = sc_list.GetSize();
4160
4161     if (m_using_apple_tables)
4162     {
4163         if (m_apple_names_ap.get())
4164             FindFunctions (regex, *m_apple_names_ap, include_inlines, sc_list);
4165     }
4166     else
4167     {
4168         // Index the DWARF if we haven't already
4169         if (!m_indexed)
4170             Index ();
4171
4172         FindFunctions (regex, m_function_basename_index, include_inlines, sc_list);
4173
4174         FindFunctions (regex, m_function_fullname_index, include_inlines, sc_list);
4175     }
4176
4177     // Return the number of variable that were appended to the list
4178     return sc_list.GetSize() - original_size;
4179 }
4180
4181 uint32_t
4182 SymbolFileDWARF::FindTypes (const SymbolContext& sc,
4183                             const ConstString &name,
4184                             const lldb_private::ClangNamespaceDecl *namespace_decl,
4185                             bool append,
4186                             uint32_t max_matches,
4187                             TypeList& types)
4188 {
4189     DWARFDebugInfo* info = DebugInfo();
4190     if (info == NULL)
4191         return 0;
4192
4193     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
4194
4195     if (log)
4196     {
4197         if (namespace_decl)
4198             GetObjectFile()->GetModule()->LogMessage (log,
4199                                                       "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list)",
4200                                                       name.GetCString(),
4201                                                       static_cast<void*>(namespace_decl->GetNamespaceDecl()),
4202                                                       namespace_decl->GetQualifiedName().c_str(),
4203                                                       append, max_matches);
4204         else
4205             GetObjectFile()->GetModule()->LogMessage (log,
4206                                                       "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list)",
4207                                                       name.GetCString(), append,
4208                                                       max_matches);
4209     }
4210
4211     // If we aren't appending the results to this list, then clear the list
4212     if (!append)
4213         types.Clear();
4214
4215     if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
4216         return 0;
4217
4218     DIEArray die_offsets;
4219
4220     if (m_using_apple_tables)
4221     {
4222         if (m_apple_types_ap.get())
4223         {
4224             const char *name_cstr = name.GetCString();
4225             m_apple_types_ap->FindByName (name_cstr, die_offsets);
4226         }
4227     }
4228     else
4229     {
4230         if (!m_indexed)
4231             Index ();
4232
4233         m_type_index.Find (name, die_offsets);
4234     }
4235
4236     const size_t num_die_matches = die_offsets.size();
4237
4238     if (num_die_matches)
4239     {
4240         const uint32_t initial_types_size = types.GetSize();
4241         DWARFCompileUnit* dwarf_cu = NULL;
4242         const DWARFDebugInfoEntry* die = NULL;
4243         DWARFDebugInfo* debug_info = DebugInfo();
4244         for (size_t i=0; i<num_die_matches; ++i)
4245         {
4246             const dw_offset_t die_offset = die_offsets[i];
4247             die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
4248
4249             if (die)
4250             {
4251                 if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
4252                     continue;
4253
4254                 Type *matching_type = ResolveType (dwarf_cu, die);
4255                 if (matching_type)
4256                 {
4257                     // We found a type pointer, now find the shared pointer form our type list
4258                     types.InsertUnique (matching_type->shared_from_this());
4259                     if (types.GetSize() >= max_matches)
4260                         break;
4261                 }
4262             }
4263             else
4264             {
4265                 if (m_using_apple_tables)
4266                 {
4267                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
4268                                                                                die_offset, name.GetCString());
4269                 }
4270             }
4271
4272         }
4273         const uint32_t num_matches = types.GetSize() - initial_types_size;
4274         if (log && num_matches)
4275         {
4276             if (namespace_decl)
4277             {
4278                 GetObjectFile()->GetModule()->LogMessage (log,
4279                                                           "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list) => %u",
4280                                                           name.GetCString(),
4281                                                           static_cast<void*>(namespace_decl->GetNamespaceDecl()),
4282                                                           namespace_decl->GetQualifiedName().c_str(),
4283                                                           append, max_matches,
4284                                                           num_matches);
4285             }
4286             else
4287             {
4288                 GetObjectFile()->GetModule()->LogMessage (log,
4289                                                           "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list) => %u",
4290                                                           name.GetCString(),
4291                                                           append, max_matches,
4292                                                           num_matches);
4293             }
4294         }
4295         return num_matches;
4296     }
4297     return 0;
4298 }
4299
4300
4301 ClangNamespaceDecl
4302 SymbolFileDWARF::FindNamespace (const SymbolContext& sc,
4303                                 const ConstString &name,
4304                                 const lldb_private::ClangNamespaceDecl *parent_namespace_decl)
4305 {
4306     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
4307
4308     if (log)
4309     {
4310         GetObjectFile()->GetModule()->LogMessage (log,
4311                                                   "SymbolFileDWARF::FindNamespace (sc, name=\"%s\")",
4312                                                   name.GetCString());
4313     }
4314
4315     if (!NamespaceDeclMatchesThisSymbolFile(parent_namespace_decl))
4316         return ClangNamespaceDecl();
4317
4318     ClangNamespaceDecl namespace_decl;
4319     DWARFDebugInfo* info = DebugInfo();
4320     if (info)
4321     {
4322         DIEArray die_offsets;
4323
4324         // Index if we already haven't to make sure the compile units
4325         // get indexed and make their global DIE index list
4326         if (m_using_apple_tables)
4327         {
4328             if (m_apple_namespaces_ap.get())
4329             {
4330                 const char *name_cstr = name.GetCString();
4331                 m_apple_namespaces_ap->FindByName (name_cstr, die_offsets);
4332             }
4333         }
4334         else
4335         {
4336             if (!m_indexed)
4337                 Index ();
4338
4339             m_namespace_index.Find (name, die_offsets);
4340         }
4341
4342         DWARFCompileUnit* dwarf_cu = NULL;
4343         const DWARFDebugInfoEntry* die = NULL;
4344         const size_t num_matches = die_offsets.size();
4345         if (num_matches)
4346         {
4347             DWARFDebugInfo* debug_info = DebugInfo();
4348             for (size_t i=0; i<num_matches; ++i)
4349             {
4350                 const dw_offset_t die_offset = die_offsets[i];
4351                 die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
4352
4353                 if (die)
4354                 {
4355                     if (parent_namespace_decl && !DIEIsInNamespace (parent_namespace_decl, dwarf_cu, die))
4356                         continue;
4357
4358                     clang::NamespaceDecl *clang_namespace_decl = ResolveNamespaceDIE (dwarf_cu, die);
4359                     if (clang_namespace_decl)
4360                     {
4361                         namespace_decl.SetASTContext (GetClangASTContext().getASTContext());
4362                         namespace_decl.SetNamespaceDecl (clang_namespace_decl);
4363                         break;
4364                     }
4365                 }
4366                 else
4367                 {
4368                     if (m_using_apple_tables)
4369                     {
4370                         GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_namespaces accelerator table had bad die 0x%8.8x for '%s')\n",
4371                                                                    die_offset, name.GetCString());
4372                     }
4373                 }
4374
4375             }
4376         }
4377     }
4378     if (log && namespace_decl.GetNamespaceDecl())
4379     {
4380         GetObjectFile()->GetModule()->LogMessage (log,
4381                                                   "SymbolFileDWARF::FindNamespace (sc, name=\"%s\") => clang::NamespaceDecl(%p) \"%s\"",
4382                                                   name.GetCString(),
4383                                                   static_cast<const void*>(namespace_decl.GetNamespaceDecl()),
4384                                                   namespace_decl.GetQualifiedName().c_str());
4385     }
4386
4387     return namespace_decl;
4388 }
4389
4390 uint32_t
4391 SymbolFileDWARF::FindTypes(std::vector<dw_offset_t> die_offsets, uint32_t max_matches, TypeList& types)
4392 {
4393     // Remember how many sc_list are in the list before we search in case
4394     // we are appending the results to a variable list.
4395     uint32_t original_size = types.GetSize();
4396
4397     const uint32_t num_die_offsets = die_offsets.size();
4398     // Parse all of the types we found from the pubtypes matches
4399     uint32_t i;
4400     uint32_t num_matches = 0;
4401     for (i = 0; i < num_die_offsets; ++i)
4402     {
4403         Type *matching_type = ResolveTypeUID (die_offsets[i]);
4404         if (matching_type)
4405         {
4406             // We found a type pointer, now find the shared pointer form our type list
4407             types.InsertUnique (matching_type->shared_from_this());
4408             ++num_matches;
4409             if (num_matches >= max_matches)
4410                 break;
4411         }
4412     }
4413
4414     // Return the number of variable that were appended to the list
4415     return types.GetSize() - original_size;
4416 }
4417
4418
4419 size_t
4420 SymbolFileDWARF::ParseChildParameters (const SymbolContext& sc,
4421                                        clang::DeclContext *containing_decl_ctx,
4422                                        DWARFCompileUnit* dwarf_cu,
4423                                        const DWARFDebugInfoEntry *parent_die,
4424                                        bool skip_artificial,
4425                                        bool &is_static,
4426                                        bool &is_variadic,
4427                                        std::vector<ClangASTType>& function_param_types,
4428                                        std::vector<clang::ParmVarDecl*>& function_param_decls,
4429                                        unsigned &type_quals) // ,
4430                                        // ClangASTContext::TemplateParameterInfos &template_param_infos))
4431 {
4432     if (parent_die == NULL)
4433         return 0;
4434
4435     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
4436
4437     size_t arg_idx = 0;
4438     const DWARFDebugInfoEntry *die;
4439     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4440     {
4441         dw_tag_t tag = die->Tag();
4442         switch (tag)
4443         {
4444         case DW_TAG_formal_parameter:
4445             {
4446                 DWARFDebugInfoEntry::Attributes attributes;
4447                 const size_t num_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4448                 if (num_attributes > 0)
4449                 {
4450                     const char *name = NULL;
4451                     Declaration decl;
4452                     dw_offset_t param_type_die_offset = DW_INVALID_OFFSET;
4453                     bool is_artificial = false;
4454                     // one of None, Auto, Register, Extern, Static, PrivateExtern
4455
4456                     clang::StorageClass storage = clang::SC_None;
4457                     uint32_t i;
4458                     for (i=0; i<num_attributes; ++i)
4459                     {
4460                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
4461                         DWARFFormValue form_value;
4462                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4463                         {
4464                             switch (attr)
4465                             {
4466                             case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4467                             case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
4468                             case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4469                             case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
4470                             case DW_AT_type:        param_type_die_offset = form_value.Reference(); break;
4471                             case DW_AT_artificial:  is_artificial = form_value.Boolean(); break;
4472                             case DW_AT_location:
4473     //                          if (form_value.BlockData())
4474     //                          {
4475     //                              const DWARFDataExtractor& debug_info_data = debug_info();
4476     //                              uint32_t block_length = form_value.Unsigned();
4477     //                              DWARFDataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length);
4478     //                          }
4479     //                          else
4480     //                          {
4481     //                          }
4482     //                          break;
4483                             case DW_AT_const_value:
4484                             case DW_AT_default_value:
4485                             case DW_AT_description:
4486                             case DW_AT_endianity:
4487                             case DW_AT_is_optional:
4488                             case DW_AT_segment:
4489                             case DW_AT_variable_parameter:
4490                             default:
4491                             case DW_AT_abstract_origin:
4492                             case DW_AT_sibling:
4493                                 break;
4494                             }
4495                         }
4496                     }
4497
4498                     bool skip = false;
4499                     if (skip_artificial)
4500                     {
4501                         if (is_artificial)
4502                         {
4503                             // In order to determine if a C++ member function is
4504                             // "const" we have to look at the const-ness of "this"...
4505                             // Ugly, but that
4506                             if (arg_idx == 0)
4507                             {
4508                                 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()))
4509                                 {
4510                                     // Often times compilers omit the "this" name for the
4511                                     // specification DIEs, so we can't rely upon the name
4512                                     // being in the formal parameter DIE...
4513                                     if (name == NULL || ::strcmp(name, "this")==0)
4514                                     {
4515                                         Type *this_type = ResolveTypeUID (param_type_die_offset);
4516                                         if (this_type)
4517                                         {
4518                                             uint32_t encoding_mask = this_type->GetEncodingMask();
4519                                             if (encoding_mask & Type::eEncodingIsPointerUID)
4520                                             {
4521                                                 is_static = false;
4522
4523                                                 if (encoding_mask & (1u << Type::eEncodingIsConstUID))
4524                                                     type_quals |= clang::Qualifiers::Const;
4525                                                 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID))
4526                                                     type_quals |= clang::Qualifiers::Volatile;
4527                                             }
4528                                         }
4529                                     }
4530                                 }
4531                             }
4532                             skip = true;
4533                         }
4534                         else
4535                         {
4536
4537                             // HACK: Objective C formal parameters "self" and "_cmd"
4538                             // are not marked as artificial in the DWARF...
4539                             CompileUnit *comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
4540                             if (comp_unit)
4541                             {
4542                                 switch (comp_unit->GetLanguage())
4543                                 {
4544                                     case eLanguageTypeObjC:
4545                                     case eLanguageTypeObjC_plus_plus:
4546                                         if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0))
4547                                             skip = true;
4548                                         break;
4549                                     default:
4550                                         break;
4551                                 }
4552                             }
4553                         }
4554                     }
4555
4556                     if (!skip)
4557                     {
4558                         Type *type = ResolveTypeUID(param_type_die_offset);
4559                         if (type)
4560                         {
4561                             function_param_types.push_back (type->GetClangForwardType());
4562
4563                             clang::ParmVarDecl *param_var_decl = GetClangASTContext().CreateParameterDeclaration (name,
4564                                                                                                                   type->GetClangForwardType(),
4565                                                                                                                   storage);
4566                             assert(param_var_decl);
4567                             function_param_decls.push_back(param_var_decl);
4568
4569                             GetClangASTContext().SetMetadataAsUserID (param_var_decl, MakeUserID(die->GetOffset()));
4570                         }
4571                     }
4572                 }
4573                 arg_idx++;
4574             }
4575             break;
4576
4577         case DW_TAG_unspecified_parameters:
4578             is_variadic = true;
4579             break;
4580
4581         case DW_TAG_template_type_parameter:
4582         case DW_TAG_template_value_parameter:
4583             // The one caller of this was never using the template_param_infos,
4584             // and the local variable was taking up a large amount of stack space
4585             // in SymbolFileDWARF::ParseType() so this was removed. If we ever need
4586             // the template params back, we can add them back.
4587             // ParseTemplateDIE (dwarf_cu, die, template_param_infos);
4588             break;
4589
4590         default:
4591             break;
4592         }
4593     }
4594     return arg_idx;
4595 }
4596
4597 size_t
4598 SymbolFileDWARF::ParseChildEnumerators
4599 (
4600     const SymbolContext& sc,
4601     lldb_private::ClangASTType &clang_type,
4602     bool is_signed,
4603     uint32_t enumerator_byte_size,
4604     DWARFCompileUnit* dwarf_cu,
4605     const DWARFDebugInfoEntry *parent_die
4606 )
4607 {
4608     if (parent_die == NULL)
4609         return 0;
4610
4611     size_t enumerators_added = 0;
4612     const DWARFDebugInfoEntry *die;
4613     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
4614
4615     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4616     {
4617         const dw_tag_t tag = die->Tag();
4618         if (tag == DW_TAG_enumerator)
4619         {
4620             DWARFDebugInfoEntry::Attributes attributes;
4621             const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4622             if (num_child_attributes > 0)
4623             {
4624                 const char *name = NULL;
4625                 bool got_value = false;
4626                 int64_t enum_value = 0;
4627                 Declaration decl;
4628
4629                 uint32_t i;
4630                 for (i=0; i<num_child_attributes; ++i)
4631                 {
4632                     const dw_attr_t attr = attributes.AttributeAtIndex(i);
4633                     DWARFFormValue form_value;
4634                     if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4635                     {
4636                         switch (attr)
4637                         {
4638                         case DW_AT_const_value:
4639                             got_value = true;
4640                             if (is_signed)
4641                                 enum_value = form_value.Signed();
4642                             else
4643                                 enum_value = form_value.Unsigned();
4644                             break;
4645
4646                         case DW_AT_name:
4647                             name = form_value.AsCString(&get_debug_str_data());
4648                             break;
4649
4650                         case DW_AT_description:
4651                         default:
4652                         case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4653                         case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
4654                         case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4655                         case DW_AT_sibling:
4656                             break;
4657                         }
4658                     }
4659                 }
4660
4661                 if (name && name[0] && got_value)
4662                 {
4663                     clang_type.AddEnumerationValueToEnumerationType (clang_type.GetEnumerationIntegerType(),
4664                                                                      decl,
4665                                                                      name,
4666                                                                      enum_value,
4667                                                                      enumerator_byte_size * 8);
4668                     ++enumerators_added;
4669                 }
4670             }
4671         }
4672     }
4673     return enumerators_added;
4674 }
4675
4676 void
4677 SymbolFileDWARF::ParseChildArrayInfo
4678 (
4679     const SymbolContext& sc,
4680     DWARFCompileUnit* dwarf_cu,
4681     const DWARFDebugInfoEntry *parent_die,
4682     int64_t& first_index,
4683     std::vector<uint64_t>& element_orders,
4684     uint32_t& byte_stride,
4685     uint32_t& bit_stride
4686 )
4687 {
4688     if (parent_die == NULL)
4689         return;
4690
4691     const DWARFDebugInfoEntry *die;
4692     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
4693     for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4694     {
4695         const dw_tag_t tag = die->Tag();
4696         switch (tag)
4697         {
4698         case DW_TAG_subrange_type:
4699             {
4700                 DWARFDebugInfoEntry::Attributes attributes;
4701                 const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4702                 if (num_child_attributes > 0)
4703                 {
4704                     uint64_t num_elements = 0;
4705                     uint64_t lower_bound = 0;
4706                     uint64_t upper_bound = 0;
4707                     bool upper_bound_valid = false;
4708                     uint32_t i;
4709                     for (i=0; i<num_child_attributes; ++i)
4710                     {
4711                         const dw_attr_t attr = attributes.AttributeAtIndex(i);
4712                         DWARFFormValue form_value;
4713                         if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4714                         {
4715                             switch (attr)
4716                             {
4717                             case DW_AT_name:
4718                                 break;
4719
4720                             case DW_AT_count:
4721                                 num_elements = form_value.Unsigned();
4722                                 break;
4723
4724                             case DW_AT_bit_stride:
4725                                 bit_stride = form_value.Unsigned();
4726                                 break;
4727
4728                             case DW_AT_byte_stride:
4729                                 byte_stride = form_value.Unsigned();
4730                                 break;
4731
4732                             case DW_AT_lower_bound:
4733                                 lower_bound = form_value.Unsigned();
4734                                 break;
4735
4736                             case DW_AT_upper_bound:
4737                                 upper_bound_valid = true;
4738                                 upper_bound = form_value.Unsigned();
4739                                 break;
4740
4741                             default:
4742                             case DW_AT_abstract_origin:
4743                             case DW_AT_accessibility:
4744                             case DW_AT_allocated:
4745                             case DW_AT_associated:
4746                             case DW_AT_data_location:
4747                             case DW_AT_declaration:
4748                             case DW_AT_description:
4749                             case DW_AT_sibling:
4750                             case DW_AT_threads_scaled:
4751                             case DW_AT_type:
4752                             case DW_AT_visibility:
4753                                 break;
4754                             }
4755                         }
4756                     }
4757
4758                     if (num_elements == 0)
4759                     {
4760                         if (upper_bound_valid && upper_bound >= lower_bound)
4761                             num_elements = upper_bound - lower_bound + 1;
4762                     }
4763
4764                     element_orders.push_back (num_elements);
4765                 }
4766             }
4767             break;
4768         }
4769     }
4770 }
4771
4772 TypeSP
4773 SymbolFileDWARF::GetTypeForDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry* die)
4774 {
4775     TypeSP type_sp;
4776     if (die != NULL)
4777     {
4778         assert(dwarf_cu != NULL);
4779         Type *type_ptr = m_die_to_type.lookup (die);
4780         if (type_ptr == NULL)
4781         {
4782             CompileUnit* lldb_cu = GetCompUnitForDWARFCompUnit(dwarf_cu);
4783             assert (lldb_cu);
4784             SymbolContext sc(lldb_cu);
4785             type_sp = ParseType(sc, dwarf_cu, die, NULL);
4786         }
4787         else if (type_ptr != DIE_IS_BEING_PARSED)
4788         {
4789             // Grab the existing type from the master types lists
4790             type_sp = type_ptr->shared_from_this();
4791         }
4792
4793     }
4794     return type_sp;
4795 }
4796
4797 clang::DeclContext *
4798 SymbolFileDWARF::GetClangDeclContextContainingDIEOffset (dw_offset_t die_offset)
4799 {
4800     if (die_offset != DW_INVALID_OFFSET)
4801     {
4802         DWARFCompileUnitSP cu_sp;
4803         const DWARFDebugInfoEntry* die = DebugInfo()->GetDIEPtr(die_offset, &cu_sp);
4804         return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
4805     }
4806     return NULL;
4807 }
4808
4809 clang::DeclContext *
4810 SymbolFileDWARF::GetClangDeclContextForDIEOffset (const SymbolContext &sc, dw_offset_t die_offset)
4811 {
4812     if (die_offset != DW_INVALID_OFFSET)
4813     {
4814         DWARFDebugInfo* debug_info = DebugInfo();
4815         if (debug_info)
4816         {
4817             DWARFCompileUnitSP cu_sp;
4818             const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(die_offset, &cu_sp);
4819             if (die)
4820                 return GetClangDeclContextForDIE (sc, cu_sp.get(), die);
4821         }
4822     }
4823     return NULL;
4824 }
4825
4826 clang::NamespaceDecl *
4827 SymbolFileDWARF::ResolveNamespaceDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry *die)
4828 {
4829     if (die && die->Tag() == DW_TAG_namespace)
4830     {
4831         // See if we already parsed this namespace DIE and associated it with a
4832         // uniqued namespace declaration
4833         clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die]);
4834         if (namespace_decl)
4835             return namespace_decl;
4836         else
4837         {
4838             const char *namespace_name = die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL);
4839             clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, NULL);
4840             namespace_decl = GetClangASTContext().GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx);
4841             Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4842             if (log)
4843             {
4844                 if (namespace_name)
4845                 {
4846                     GetObjectFile()->GetModule()->LogMessage (log,
4847                                                               "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)",
4848                                                               static_cast<void*>(GetClangASTContext().getASTContext()),
4849                                                               MakeUserID(die->GetOffset()),
4850                                                               namespace_name,
4851                                                               static_cast<void*>(namespace_decl),
4852                                                               static_cast<void*>(namespace_decl->getOriginalNamespace()));
4853                 }
4854                 else
4855                 {
4856                     GetObjectFile()->GetModule()->LogMessage (log,
4857                                                               "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)",
4858                                                               static_cast<void*>(GetClangASTContext().getASTContext()),
4859                                                               MakeUserID(die->GetOffset()),
4860                                                               static_cast<void*>(namespace_decl),
4861                                                               static_cast<void*>(namespace_decl->getOriginalNamespace()));
4862                 }
4863             }
4864
4865             if (namespace_decl)
4866                 LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die);
4867             return namespace_decl;
4868         }
4869     }
4870     return NULL;
4871 }
4872
4873 clang::DeclContext *
4874 SymbolFileDWARF::GetClangDeclContextForDIE (const SymbolContext &sc, DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4875 {
4876     clang::DeclContext *clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4877     if (clang_decl_ctx)
4878         return clang_decl_ctx;
4879     // If this DIE has a specification, or an abstract origin, then trace to those.
4880
4881     dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4882     if (die_offset != DW_INVALID_OFFSET)
4883         return GetClangDeclContextForDIEOffset (sc, die_offset);
4884
4885     die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4886     if (die_offset != DW_INVALID_OFFSET)
4887         return GetClangDeclContextForDIEOffset (sc, die_offset);
4888
4889     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4890     if (log)
4891         GetObjectFile()->GetModule()->LogMessage(log, "SymbolFileDWARF::GetClangDeclContextForDIE (die = 0x%8.8x) %s '%s'", die->GetOffset(), DW_TAG_value_to_name(die->Tag()), die->GetName(this, cu));
4892     // This is the DIE we want.  Parse it, then query our map.
4893     bool assert_not_being_parsed = true;
4894     ResolveTypeUID (cu, die, assert_not_being_parsed);
4895
4896     clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4897
4898     return clang_decl_ctx;
4899 }
4900
4901 clang::DeclContext *
4902 SymbolFileDWARF::GetClangDeclContextContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die, const DWARFDebugInfoEntry **decl_ctx_die_copy)
4903 {
4904     if (m_clang_tu_decl == NULL)
4905         m_clang_tu_decl = GetClangASTContext().getASTContext()->getTranslationUnitDecl();
4906
4907     const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
4908
4909     if (decl_ctx_die_copy)
4910         *decl_ctx_die_copy = decl_ctx_die;
4911
4912     if (decl_ctx_die)
4913     {
4914
4915         DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find (decl_ctx_die);
4916         if (pos != m_die_to_decl_ctx.end())
4917             return pos->second;
4918
4919         switch (decl_ctx_die->Tag())
4920         {
4921         case DW_TAG_compile_unit:
4922             return m_clang_tu_decl;
4923
4924         case DW_TAG_namespace:
4925             return ResolveNamespaceDIE (cu, decl_ctx_die);
4926             break;
4927
4928         case DW_TAG_structure_type:
4929         case DW_TAG_union_type:
4930         case DW_TAG_class_type:
4931             {
4932                 Type* type = ResolveType (cu, decl_ctx_die);
4933                 if (type)
4934                 {
4935                     clang::DeclContext *decl_ctx = type->GetClangForwardType().GetDeclContextForType ();
4936                     if (decl_ctx)
4937                     {
4938                         LinkDeclContextToDIE (decl_ctx, decl_ctx_die);
4939                         if (decl_ctx)
4940                             return decl_ctx;
4941                     }
4942                 }
4943             }
4944             break;
4945
4946         default:
4947             break;
4948         }
4949     }
4950     return m_clang_tu_decl;
4951 }
4952
4953
4954 const DWARFDebugInfoEntry *
4955 SymbolFileDWARF::GetDeclContextDIEContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4956 {
4957     if (cu && die)
4958     {
4959         const DWARFDebugInfoEntry * const decl_die = die;
4960
4961         while (die != NULL)
4962         {
4963             // If this is the original DIE that we are searching for a declaration
4964             // for, then don't look in the cache as we don't want our own decl
4965             // context to be our decl context...
4966             if (decl_die != die)
4967             {
4968                 switch (die->Tag())
4969                 {
4970                     case DW_TAG_compile_unit:
4971                     case DW_TAG_namespace:
4972                     case DW_TAG_structure_type:
4973                     case DW_TAG_union_type:
4974                     case DW_TAG_class_type:
4975                         return die;
4976
4977                     default:
4978                         break;
4979                 }
4980             }
4981
4982             dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4983             if (die_offset != DW_INVALID_OFFSET)
4984             {
4985                 DWARFCompileUnit *spec_cu = cu;
4986                 const DWARFDebugInfoEntry *spec_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &spec_cu);
4987                 const DWARFDebugInfoEntry *spec_die_decl_ctx_die = GetDeclContextDIEContainingDIE (spec_cu, spec_die);
4988                 if (spec_die_decl_ctx_die)
4989                     return spec_die_decl_ctx_die;
4990             }
4991
4992             die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4993             if (die_offset != DW_INVALID_OFFSET)
4994             {
4995                 DWARFCompileUnit *abs_cu = cu;
4996                 const DWARFDebugInfoEntry *abs_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &abs_cu);
4997                 const DWARFDebugInfoEntry *abs_die_decl_ctx_die = GetDeclContextDIEContainingDIE (abs_cu, abs_die);
4998                 if (abs_die_decl_ctx_die)
4999                     return abs_die_decl_ctx_die;
5000             }
5001
5002             die = die->GetParent();
5003         }
5004     }
5005     return NULL;
5006 }
5007
5008
5009 Symbol *
5010 SymbolFileDWARF::GetObjCClassSymbol (const ConstString &objc_class_name)
5011 {
5012     Symbol *objc_class_symbol = NULL;
5013     if (m_obj_file)
5014     {
5015         Symtab *symtab = m_obj_file->GetSymtab ();
5016         if (symtab)
5017         {
5018             objc_class_symbol = symtab->FindFirstSymbolWithNameAndType (objc_class_name,
5019                                                                         eSymbolTypeObjCClass,
5020                                                                         Symtab::eDebugNo,
5021                                                                         Symtab::eVisibilityAny);
5022         }
5023     }
5024     return objc_class_symbol;
5025 }
5026
5027 // Some compilers don't emit the DW_AT_APPLE_objc_complete_type attribute. If they don't
5028 // then we can end up looking through all class types for a complete type and never find
5029 // the full definition. We need to know if this attribute is supported, so we determine
5030 // this here and cache th result. We also need to worry about the debug map DWARF file
5031 // if we are doing darwin DWARF in .o file debugging.
5032 bool
5033 SymbolFileDWARF::Supports_DW_AT_APPLE_objc_complete_type (DWARFCompileUnit *cu)
5034 {
5035     if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolCalculate)
5036     {
5037         m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolNo;
5038         if (cu && cu->Supports_DW_AT_APPLE_objc_complete_type())
5039             m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
5040         else
5041         {
5042             DWARFDebugInfo* debug_info = DebugInfo();
5043             const uint32_t num_compile_units = GetNumCompileUnits();
5044             for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
5045             {
5046                 DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
5047                 if (dwarf_cu != cu && dwarf_cu->Supports_DW_AT_APPLE_objc_complete_type())
5048                 {
5049                     m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
5050                     break;
5051                 }
5052             }
5053         }
5054         if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolNo && GetDebugMapSymfile ())
5055             return m_debug_map_symfile->Supports_DW_AT_APPLE_objc_complete_type (this);
5056     }
5057     return m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolYes;
5058 }
5059
5060 // This function can be used when a DIE is found that is a forward declaration
5061 // DIE and we want to try and find a type that has the complete definition.
5062 TypeSP
5063 SymbolFileDWARF::FindCompleteObjCDefinitionTypeForDIE (const DWARFDebugInfoEntry *die,
5064                                                        const ConstString &type_name,
5065                                                        bool must_be_implementation)
5066 {
5067
5068     TypeSP type_sp;
5069
5070     if (!type_name || (must_be_implementation && !GetObjCClassSymbol (type_name)))
5071         return type_sp;
5072
5073     DIEArray die_offsets;
5074
5075     if (m_using_apple_tables)
5076     {
5077         if (m_apple_types_ap.get())
5078         {
5079             const char *name_cstr = type_name.GetCString();
5080             m_apple_types_ap->FindCompleteObjCClassByName (name_cstr, die_offsets, must_be_implementation);
5081         }
5082     }
5083     else
5084     {
5085         if (!m_indexed)
5086             Index ();
5087
5088         m_type_index.Find (type_name, die_offsets);
5089     }
5090
5091     const size_t num_matches = die_offsets.size();
5092
5093     DWARFCompileUnit* type_cu = NULL;
5094     const DWARFDebugInfoEntry* type_die = NULL;
5095     if (num_matches)
5096     {
5097         DWARFDebugInfo* debug_info = DebugInfo();
5098         for (size_t i=0; i<num_matches; ++i)
5099         {
5100             const dw_offset_t die_offset = die_offsets[i];
5101             type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5102
5103             if (type_die)
5104             {
5105                 bool try_resolving_type = false;
5106
5107                 // Don't try and resolve the DIE we are looking for with the DIE itself!
5108                 if (type_die != die)
5109                 {
5110                     switch (type_die->Tag())
5111                     {
5112                         case DW_TAG_class_type:
5113                         case DW_TAG_structure_type:
5114                             try_resolving_type = true;
5115                             break;
5116                         default:
5117                             break;
5118                     }
5119                 }
5120
5121                 if (try_resolving_type)
5122                 {
5123                     if (must_be_implementation && type_cu->Supports_DW_AT_APPLE_objc_complete_type())
5124                         try_resolving_type = type_die->GetAttributeValueAsUnsigned (this, type_cu, DW_AT_APPLE_objc_complete_type, 0);
5125
5126                     if (try_resolving_type)
5127                     {
5128                         Type *resolved_type = ResolveType (type_cu, type_die, false);
5129                         if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5130                         {
5131                             DEBUG_PRINTF ("resolved 0x%8.8" PRIx64 " from %s to 0x%8.8" PRIx64 " (cu 0x%8.8" PRIx64 ")\n",
5132                                           MakeUserID(die->GetOffset()),
5133                                           m_obj_file->GetFileSpec().GetFilename().AsCString("<Unknown>"),
5134                                           MakeUserID(type_die->GetOffset()),
5135                                           MakeUserID(type_cu->GetOffset()));
5136
5137                             if (die)
5138                                 m_die_to_type[die] = resolved_type;
5139                             type_sp = resolved_type->shared_from_this();
5140                             break;
5141                         }
5142                     }
5143                 }
5144             }
5145             else
5146             {
5147                 if (m_using_apple_tables)
5148                 {
5149                     GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5150                                                                die_offset, type_name.GetCString());
5151                 }
5152             }
5153
5154         }
5155     }
5156     return type_sp;
5157 }
5158
5159
5160 //----------------------------------------------------------------------
5161 // This function helps to ensure that the declaration contexts match for
5162 // two different DIEs. Often times debug information will refer to a
5163 // forward declaration of a type (the equivalent of "struct my_struct;".
5164 // There will often be a declaration of that type elsewhere that has the
5165 // full definition. When we go looking for the full type "my_struct", we
5166 // will find one or more matches in the accelerator tables and we will
5167 // then need to make sure the type was in the same declaration context
5168 // as the original DIE. This function can efficiently compare two DIEs
5169 // and will return true when the declaration context matches, and false
5170 // when they don't.
5171 //----------------------------------------------------------------------
5172 bool
5173 SymbolFileDWARF::DIEDeclContextsMatch (DWARFCompileUnit* cu1, const DWARFDebugInfoEntry *die1,
5174                                        DWARFCompileUnit* cu2, const DWARFDebugInfoEntry *die2)
5175 {
5176     if (die1 == die2)
5177         return true;
5178
5179 #if defined (LLDB_CONFIGURATION_DEBUG)
5180     // You can't and shouldn't call this function with a compile unit from
5181     // two different SymbolFileDWARF instances.
5182     assert (DebugInfo()->ContainsCompileUnit (cu1));
5183     assert (DebugInfo()->ContainsCompileUnit (cu2));
5184 #endif
5185
5186     DWARFDIECollection decl_ctx_1;
5187     DWARFDIECollection decl_ctx_2;
5188     //The declaration DIE stack is a stack of the declaration context
5189     // DIEs all the way back to the compile unit. If a type "T" is
5190     // declared inside a class "B", and class "B" is declared inside
5191     // a class "A" and class "A" is in a namespace "lldb", and the
5192     // namespace is in a compile unit, there will be a stack of DIEs:
5193     //
5194     //   [0] DW_TAG_class_type for "B"
5195     //   [1] DW_TAG_class_type for "A"
5196     //   [2] DW_TAG_namespace  for "lldb"
5197     //   [3] DW_TAG_compile_unit for the source file.
5198     //
5199     // We grab both contexts and make sure that everything matches
5200     // all the way back to the compiler unit.
5201
5202     // First lets grab the decl contexts for both DIEs
5203     die1->GetDeclContextDIEs (this, cu1, decl_ctx_1);
5204     die2->GetDeclContextDIEs (this, cu2, decl_ctx_2);
5205     // Make sure the context arrays have the same size, otherwise
5206     // we are done
5207     const size_t count1 = decl_ctx_1.Size();
5208     const size_t count2 = decl_ctx_2.Size();
5209     if (count1 != count2)
5210         return false;
5211
5212     // Make sure the DW_TAG values match all the way back up the
5213     // compile unit. If they don't, then we are done.
5214     const DWARFDebugInfoEntry *decl_ctx_die1;
5215     const DWARFDebugInfoEntry *decl_ctx_die2;
5216     size_t i;
5217     for (i=0; i<count1; i++)
5218     {
5219         decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
5220         decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
5221         if (decl_ctx_die1->Tag() != decl_ctx_die2->Tag())
5222             return false;
5223     }
5224 #if defined LLDB_CONFIGURATION_DEBUG
5225
5226     // Make sure the top item in the decl context die array is always
5227     // DW_TAG_compile_unit. If it isn't then something went wrong in
5228     // the DWARFDebugInfoEntry::GetDeclContextDIEs() function...
5229     assert (decl_ctx_1.GetDIEPtrAtIndex (count1 - 1)->Tag() == DW_TAG_compile_unit);
5230
5231 #endif
5232     // Always skip the compile unit when comparing by only iterating up to
5233     // "count - 1". Here we compare the names as we go.
5234     for (i=0; i<count1 - 1; i++)
5235     {
5236         decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
5237         decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
5238         const char *name1 = decl_ctx_die1->GetName(this, cu1);
5239         const char *name2 = decl_ctx_die2->GetName(this, cu2);
5240         // If the string was from a DW_FORM_strp, then the pointer will often
5241         // be the same!
5242         if (name1 == name2)
5243             continue;
5244
5245         // Name pointers are not equal, so only compare the strings
5246         // if both are not NULL.
5247         if (name1 && name2)
5248         {
5249             // If the strings don't compare, we are done...
5250             if (strcmp(name1, name2) != 0)
5251                 return false;
5252         }
5253         else
5254         {
5255             // One name was NULL while the other wasn't
5256             return false;
5257         }
5258     }
5259     // We made it through all of the checks and the declaration contexts
5260     // are equal.
5261     return true;
5262 }
5263
5264
5265 TypeSP
5266 SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext (const DWARFDeclContext &dwarf_decl_ctx)
5267 {
5268     TypeSP type_sp;
5269
5270     const uint32_t dwarf_decl_ctx_count = dwarf_decl_ctx.GetSize();
5271     if (dwarf_decl_ctx_count > 0)
5272     {
5273         const ConstString type_name(dwarf_decl_ctx[0].name);
5274         const dw_tag_t tag = dwarf_decl_ctx[0].tag;
5275
5276         if (type_name)
5277         {
5278             Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
5279             if (log)
5280             {
5281                 GetObjectFile()->GetModule()->LogMessage (log,
5282                                                           "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s')",
5283                                                           DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5284                                                           dwarf_decl_ctx.GetQualifiedName());
5285             }
5286
5287             DIEArray die_offsets;
5288
5289             if (m_using_apple_tables)
5290             {
5291                 if (m_apple_types_ap.get())
5292                 {
5293                     const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
5294                     const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
5295                     if (has_tag && has_qualified_name_hash)
5296                     {
5297                         const char *qualified_name = dwarf_decl_ctx.GetQualifiedName();
5298                         const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name);
5299                         if (log)
5300                             GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
5301                         m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), tag, qualified_name_hash, die_offsets);
5302                     }
5303                     else if (has_tag)
5304                     {
5305                         if (log)
5306                             GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
5307                         m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), tag, die_offsets);
5308                     }
5309                     else
5310                     {
5311                         m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
5312                     }
5313                 }
5314             }
5315             else
5316             {
5317                 if (!m_indexed)
5318                     Index ();
5319
5320                 m_type_index.Find (type_name, die_offsets);
5321             }
5322
5323             const size_t num_matches = die_offsets.size();
5324
5325
5326             DWARFCompileUnit* type_cu = NULL;
5327             const DWARFDebugInfoEntry* type_die = NULL;
5328             if (num_matches)
5329             {
5330                 DWARFDebugInfo* debug_info = DebugInfo();
5331                 for (size_t i=0; i<num_matches; ++i)
5332                 {
5333                     const dw_offset_t die_offset = die_offsets[i];
5334                     type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5335
5336                     if (type_die)
5337                     {
5338                         bool try_resolving_type = false;
5339
5340                         // Don't try and resolve the DIE we are looking for with the DIE itself!
5341                         const dw_tag_t type_tag = type_die->Tag();
5342                         // Make sure the tags match
5343                         if (type_tag == tag)
5344                         {
5345                             // The tags match, lets try resolving this type
5346                             try_resolving_type = true;
5347                         }
5348                         else
5349                         {
5350                             // The tags don't match, but we need to watch our for a
5351                             // forward declaration for a struct and ("struct foo")
5352                             // ends up being a class ("class foo { ... };") or
5353                             // vice versa.
5354                             switch (type_tag)
5355                             {
5356                                 case DW_TAG_class_type:
5357                                     // We had a "class foo", see if we ended up with a "struct foo { ... };"
5358                                     try_resolving_type = (tag == DW_TAG_structure_type);
5359                                     break;
5360                                 case DW_TAG_structure_type:
5361                                     // We had a "struct foo", see if we ended up with a "class foo { ... };"
5362                                     try_resolving_type = (tag == DW_TAG_class_type);
5363                                     break;
5364                                 default:
5365                                     // Tags don't match, don't event try to resolve
5366                                     // using this type whose name matches....
5367                                     break;
5368                             }
5369                         }
5370
5371                         if (try_resolving_type)
5372                         {
5373                             DWARFDeclContext type_dwarf_decl_ctx;
5374                             type_die->GetDWARFDeclContext (this, type_cu, type_dwarf_decl_ctx);
5375
5376                             if (log)
5377                             {
5378                                 GetObjectFile()->GetModule()->LogMessage (log,
5379                                                                           "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') trying die=0x%8.8x (%s)",
5380                                                                           DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5381                                                                           dwarf_decl_ctx.GetQualifiedName(),
5382                                                                           type_die->GetOffset(),
5383                                                                           type_dwarf_decl_ctx.GetQualifiedName());
5384                             }
5385
5386                             // Make sure the decl contexts match all the way up
5387                             if (dwarf_decl_ctx == type_dwarf_decl_ctx)
5388                             {
5389                                 Type *resolved_type = ResolveType (type_cu, type_die, false);
5390                                 if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5391                                 {
5392                                     type_sp = resolved_type->shared_from_this();
5393                                     break;
5394                                 }
5395                             }
5396                         }
5397                         else
5398                         {
5399                             if (log)
5400                             {
5401                                 std::string qualified_name;
5402                                 type_die->GetQualifiedName(this, type_cu, qualified_name);
5403                                 GetObjectFile()->GetModule()->LogMessage (log,
5404                                                                           "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') ignoring die=0x%8.8x (%s)",
5405                                                                           DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5406                                                                           dwarf_decl_ctx.GetQualifiedName(),
5407                                                                           type_die->GetOffset(),
5408                                                                           qualified_name.c_str());
5409                             }
5410                         }
5411                     }
5412                     else
5413                     {
5414                         if (m_using_apple_tables)
5415                         {
5416                             GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5417                                                                                        die_offset, type_name.GetCString());
5418                         }
5419                     }
5420
5421                 }
5422             }
5423         }
5424     }
5425     return type_sp;
5426 }
5427
5428 bool
5429 SymbolFileDWARF::CopyUniqueClassMethodTypes (SymbolFileDWARF *src_symfile,
5430                                              Type *class_type,
5431                                              DWARFCompileUnit* src_cu,
5432                                              const DWARFDebugInfoEntry *src_class_die,
5433                                              DWARFCompileUnit* dst_cu,
5434                                              const DWARFDebugInfoEntry *dst_class_die,
5435                                              DWARFDIECollection &failures)
5436 {
5437     if (!class_type || !src_cu || !src_class_die || !dst_cu || !dst_class_die)
5438         return false;
5439     if (src_class_die->Tag() != dst_class_die->Tag())
5440         return false;
5441
5442     // We need to complete the class type so we can get all of the method types
5443     // parsed so we can then unique those types to their equivalent counterparts
5444     // in "dst_cu" and "dst_class_die"
5445     class_type->GetClangFullType();
5446
5447     const DWARFDebugInfoEntry *src_die;
5448     const DWARFDebugInfoEntry *dst_die;
5449     UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die;
5450     UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die;
5451     UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die_artificial;
5452     UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die_artificial;
5453     for (src_die = src_class_die->GetFirstChild(); src_die != NULL; src_die = src_die->GetSibling())
5454     {
5455         if (src_die->Tag() == DW_TAG_subprogram)
5456         {
5457             // Make sure this is a declaration and not a concrete instance by looking
5458             // for DW_AT_declaration set to 1. Sometimes concrete function instances
5459             // are placed inside the class definitions and shouldn't be included in
5460             // the list of things are are tracking here.
5461             if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_declaration, 0) == 1)
5462             {
5463                 const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5464                 if (src_name)
5465                 {
5466                     ConstString src_const_name(src_name);
5467                     if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_artificial, 0))
5468                         src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die);
5469                     else
5470                         src_name_to_die.Append(src_const_name.GetCString(), src_die);
5471                 }
5472             }
5473         }
5474     }
5475     for (dst_die = dst_class_die->GetFirstChild(); dst_die != NULL; dst_die = dst_die->GetSibling())
5476     {
5477         if (dst_die->Tag() == DW_TAG_subprogram)
5478         {
5479             // Make sure this is a declaration and not a concrete instance by looking
5480             // for DW_AT_declaration set to 1. Sometimes concrete function instances
5481             // are placed inside the class definitions and shouldn't be included in
5482             // the list of things are are tracking here.
5483             if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_declaration, 0) == 1)
5484             {
5485                 const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5486                 if (dst_name)
5487                 {
5488                     ConstString dst_const_name(dst_name);
5489                     if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_artificial, 0))
5490                         dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die);
5491                     else
5492                         dst_name_to_die.Append(dst_const_name.GetCString(), dst_die);
5493                 }
5494             }
5495         }
5496     }
5497     const uint32_t src_size = src_name_to_die.GetSize ();
5498     const uint32_t dst_size = dst_name_to_die.GetSize ();
5499     Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION));
5500
5501     // Is everything kosher so we can go through the members at top speed?
5502     bool fast_path = true;
5503
5504     if (src_size != dst_size)
5505     {
5506         if (src_size != 0 && dst_size != 0)
5507         {
5508             if (log)
5509                 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, but they didn't have the same size (src=%d, dst=%d)",
5510                             src_class_die->GetOffset(),
5511                             dst_class_die->GetOffset(),
5512                             src_size,
5513                             dst_size);
5514         }
5515
5516         fast_path = false;
5517     }
5518
5519     uint32_t idx;
5520
5521     if (fast_path)
5522     {
5523         for (idx = 0; idx < src_size; ++idx)
5524         {
5525             src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5526             dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5527
5528             if (src_die->Tag() != dst_die->Tag())
5529             {
5530                 if (log)
5531                     log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)",
5532                                 src_class_die->GetOffset(),
5533                                 dst_class_die->GetOffset(),
5534                                 src_die->GetOffset(),
5535                                 DW_TAG_value_to_name(src_die->Tag()),
5536                                 dst_die->GetOffset(),
5537                                 DW_TAG_value_to_name(src_die->Tag()));
5538                 fast_path = false;
5539             }
5540
5541             const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5542             const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5543
5544             // Make sure the names match
5545             if (src_name == dst_name || (strcmp (src_name, dst_name) == 0))
5546                 continue;
5547
5548             if (log)
5549                 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)",
5550                             src_class_die->GetOffset(),
5551                             dst_class_die->GetOffset(),
5552                             src_die->GetOffset(),
5553                             src_name,
5554                             dst_die->GetOffset(),
5555                             dst_name);
5556
5557             fast_path = false;
5558         }
5559     }
5560
5561     // Now do the work of linking the DeclContexts and Types.
5562     if (fast_path)
5563     {
5564         // We can do this quickly.  Just run across the tables index-for-index since
5565         // we know each node has matching names and tags.
5566         for (idx = 0; idx < src_size; ++idx)
5567         {
5568             src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5569             dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5570
5571             clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5572             if (src_decl_ctx)
5573             {
5574                 if (log)
5575                     log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
5576                                  static_cast<void*>(src_decl_ctx),
5577                                  src_die->GetOffset(), dst_die->GetOffset());
5578                 LinkDeclContextToDIE (src_decl_ctx, dst_die);
5579             }
5580             else
5581             {
5582                 if (log)
5583                     log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found",
5584                                  src_die->GetOffset(), dst_die->GetOffset());
5585             }
5586
5587             Type *src_child_type = m_die_to_type[src_die];
5588             if (src_child_type)
5589             {
5590                 if (log)
5591                     log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x",
5592                                  static_cast<void*>(src_child_type),
5593                                  src_child_type->GetID(),
5594                                  src_die->GetOffset(), dst_die->GetOffset());
5595                 m_die_to_type[dst_die] = src_child_type;
5596             }
5597             else
5598             {
5599                 if (log)
5600                     log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5601             }
5602         }
5603     }
5604     else
5605     {
5606         // We must do this slowly.  For each member of the destination, look
5607         // up a member in the source with the same name, check its tag, and
5608         // unique them if everything matches up.  Report failures.
5609
5610         if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty())
5611         {
5612             src_name_to_die.Sort();
5613
5614             for (idx = 0; idx < dst_size; ++idx)
5615             {
5616                 const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx);
5617                 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
5618                 src_die = src_name_to_die.Find(dst_name, NULL);
5619
5620                 if (src_die && (src_die->Tag() == dst_die->Tag()))
5621                 {
5622                     clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5623                     if (src_decl_ctx)
5624                     {
5625                         if (log)
5626                             log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
5627                                          static_cast<void*>(src_decl_ctx),
5628                                          src_die->GetOffset(),
5629                                          dst_die->GetOffset());
5630                         LinkDeclContextToDIE (src_decl_ctx, dst_die);
5631                     }
5632                     else
5633                     {
5634                         if (log)
5635                             log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5636                     }
5637
5638                     Type *src_child_type = m_die_to_type[src_die];
5639                     if (src_child_type)
5640                     {
5641                         if (log)
5642                             log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x",
5643                                          static_cast<void*>(src_child_type),
5644                                          src_child_type->GetID(),
5645                                          src_die->GetOffset(),
5646                                          dst_die->GetOffset());
5647                         m_die_to_type[dst_die] = src_child_type;
5648                     }
5649                     else
5650                     {
5651                         if (log)
5652                             log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5653                     }
5654                 }
5655                 else
5656                 {
5657                     if (log)
5658                         log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die->GetOffset());
5659
5660                     failures.Append(dst_die);
5661                 }
5662             }
5663         }
5664     }
5665
5666     const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize ();
5667     const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize ();
5668
5669     UniqueCStringMap<const DWARFDebugInfoEntry *> name_to_die_artificial_not_in_src;
5670
5671     if (src_size_artificial && dst_size_artificial)
5672     {
5673         dst_name_to_die_artificial.Sort();
5674
5675         for (idx = 0; idx < src_size_artificial; ++idx)
5676         {
5677             const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx);
5678             src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5679             dst_die = dst_name_to_die_artificial.Find(src_name_artificial, NULL);
5680
5681             if (dst_die)
5682             {
5683                 // Both classes have the artificial types, link them
5684                 clang::DeclContext *src_decl_ctx = m_die_to_decl_ctx[src_die];
5685                 if (src_decl_ctx)
5686                 {
5687                     if (log)
5688                         log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
5689                                      static_cast<void*>(src_decl_ctx),
5690                                      src_die->GetOffset(), dst_die->GetOffset());
5691                     LinkDeclContextToDIE (src_decl_ctx, dst_die);
5692                 }
5693                 else
5694                 {
5695                     if (log)
5696                         log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5697                 }
5698
5699                 Type *src_child_type = m_die_to_type[src_die];
5700                 if (src_child_type)
5701                 {
5702                     if (log)
5703                         log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x",
5704                                      static_cast<void*>(src_child_type),
5705                                      src_child_type->GetID(),
5706                                      src_die->GetOffset(), dst_die->GetOffset());
5707                     m_die_to_type[dst_die] = src_child_type;
5708                 }
5709                 else
5710                 {
5711                     if (log)
5712                         log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5713                 }
5714             }
5715         }
5716     }
5717
5718     if (dst_size_artificial)
5719     {
5720         for (idx = 0; idx < dst_size_artificial; ++idx)
5721         {
5722             const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx);
5723             dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5724             if (log)
5725                 log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die->GetOffset(), dst_name_artificial);
5726
5727             failures.Append(dst_die);
5728         }
5729     }
5730
5731     return (failures.Size() != 0);
5732 }
5733
5734 TypeSP
5735 SymbolFileDWARF::ParseType (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die, bool *type_is_new_ptr)
5736 {
5737     TypeSP type_sp;
5738
5739     if (type_is_new_ptr)
5740         *type_is_new_ptr = false;
5741
5742 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
5743     static DIEStack g_die_stack;
5744     DIEStack::ScopedPopper scoped_die_logger(g_die_stack);
5745 #endif
5746
5747     AccessType accessibility = eAccessNone;
5748     if (die != NULL)
5749     {
5750         Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5751         if (log)
5752         {
5753             const DWARFDebugInfoEntry *context_die;
5754             clang::DeclContext *context = GetClangDeclContextContainingDIE (dwarf_cu, die, &context_die);
5755
5756             GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')",
5757                                                       die->GetOffset(),
5758                                                       static_cast<void*>(context),
5759                                                       context_die->GetOffset(),
5760                                                       DW_TAG_value_to_name(die->Tag()),
5761                                                       die->GetName(this, dwarf_cu));
5762
5763 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
5764             scoped_die_logger.Push (dwarf_cu, die);
5765             g_die_stack.LogDIEs(log, this);
5766 #endif
5767         }
5768 //
5769 //        Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5770 //        if (log && dwarf_cu)
5771 //        {
5772 //            StreamString s;
5773 //            die->DumpLocation (this, dwarf_cu, s);
5774 //            GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData());
5775 //
5776 //        }
5777
5778         Type *type_ptr = m_die_to_type.lookup (die);
5779         TypeList* type_list = GetTypeList();
5780         if (type_ptr == NULL)
5781         {
5782             ClangASTContext &ast = GetClangASTContext();
5783             if (type_is_new_ptr)
5784                 *type_is_new_ptr = true;
5785
5786             const dw_tag_t tag = die->Tag();
5787
5788             bool is_forward_declaration = false;
5789             DWARFDebugInfoEntry::Attributes attributes;
5790             const char *type_name_cstr = NULL;
5791             ConstString type_name_const_str;
5792             Type::ResolveState resolve_state = Type::eResolveStateUnresolved;
5793             uint64_t byte_size = 0;
5794             Declaration decl;
5795
5796             Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID;
5797             ClangASTType clang_type;
5798             DWARFFormValue form_value;
5799
5800             dw_attr_t attr;
5801
5802             switch (tag)
5803             {
5804             case DW_TAG_base_type:
5805             case DW_TAG_pointer_type:
5806             case DW_TAG_reference_type:
5807             case DW_TAG_rvalue_reference_type:
5808             case DW_TAG_typedef:
5809             case DW_TAG_const_type:
5810             case DW_TAG_restrict_type:
5811             case DW_TAG_volatile_type:
5812             case DW_TAG_unspecified_type:
5813                 {
5814                     // Set a bit that lets us know that we are currently parsing this
5815                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
5816
5817                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
5818                     uint32_t encoding = 0;
5819                     lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
5820
5821                     if (num_attributes > 0)
5822                     {
5823                         uint32_t i;
5824                         for (i=0; i<num_attributes; ++i)
5825                         {
5826                             attr = attributes.AttributeAtIndex(i);
5827                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
5828                             {
5829                                 switch (attr)
5830                                 {
5831                                 case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
5832                                 case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
5833                                 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
5834                                 case DW_AT_name:
5835
5836                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
5837                                     // Work around a bug in llvm-gcc where they give a name to a reference type which doesn't
5838                                     // include the "&"...
5839                                     if (tag == DW_TAG_reference_type)
5840                                     {
5841                                         if (strchr (type_name_cstr, '&') == NULL)
5842                                             type_name_cstr = NULL;
5843                                     }
5844                                     if (type_name_cstr)
5845                                         type_name_const_str.SetCString(type_name_cstr);
5846                                     break;
5847                                 case DW_AT_byte_size:   byte_size = form_value.Unsigned(); break;
5848                                 case DW_AT_encoding:    encoding = form_value.Unsigned(); break;
5849                                 case DW_AT_type:        encoding_uid = form_value.Reference(); break;
5850                                 default:
5851                                 case DW_AT_sibling:
5852                                     break;
5853                                 }
5854                             }
5855                         }
5856                     }
5857
5858                     DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr, encoding_uid);
5859
5860                     switch (tag)
5861                     {
5862                     default:
5863                         break;
5864
5865                     case DW_TAG_unspecified_type:
5866                         if (strcmp(type_name_cstr, "nullptr_t") == 0 ||
5867                             strcmp(type_name_cstr, "decltype(nullptr)") == 0 )
5868                         {
5869                             resolve_state = Type::eResolveStateFull;
5870                             clang_type = ast.GetBasicType(eBasicTypeNullPtr);
5871                             break;
5872                         }
5873                         // Fall through to base type below in case we can handle the type there...
5874
5875                     case DW_TAG_base_type:
5876                         resolve_state = Type::eResolveStateFull;
5877                         clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr,
5878                                                                                    encoding,
5879                                                                                    byte_size * 8);
5880                         break;
5881
5882                     case DW_TAG_pointer_type:           encoding_data_type = Type::eEncodingIsPointerUID;           break;
5883                     case DW_TAG_reference_type:         encoding_data_type = Type::eEncodingIsLValueReferenceUID;   break;
5884                     case DW_TAG_rvalue_reference_type:  encoding_data_type = Type::eEncodingIsRValueReferenceUID;   break;
5885                     case DW_TAG_typedef:                encoding_data_type = Type::eEncodingIsTypedefUID;           break;
5886                     case DW_TAG_const_type:             encoding_data_type = Type::eEncodingIsConstUID;             break;
5887                     case DW_TAG_restrict_type:          encoding_data_type = Type::eEncodingIsRestrictUID;          break;
5888                     case DW_TAG_volatile_type:          encoding_data_type = Type::eEncodingIsVolatileUID;          break;
5889                     }
5890
5891                     if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL)
5892                     {
5893                         bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus);
5894
5895                         if (translation_unit_is_objc)
5896                         {
5897                             if (type_name_cstr != NULL)
5898                             {
5899                                 static ConstString g_objc_type_name_id("id");
5900                                 static ConstString g_objc_type_name_Class("Class");
5901                                 static ConstString g_objc_type_name_selector("SEL");
5902
5903                                 if (type_name_const_str == g_objc_type_name_id)
5904                                 {
5905                                     if (log)
5906                                         GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.",
5907                                                                                   die->GetOffset(),
5908                                                                                   DW_TAG_value_to_name(die->Tag()),
5909                                                                                   die->GetName(this, dwarf_cu));
5910                                     clang_type = ast.GetBasicType(eBasicTypeObjCID);
5911                                     encoding_data_type = Type::eEncodingIsUID;
5912                                     encoding_uid = LLDB_INVALID_UID;
5913                                     resolve_state = Type::eResolveStateFull;
5914
5915                                 }
5916                                 else if (type_name_const_str == g_objc_type_name_Class)
5917                                 {
5918                                     if (log)
5919                                         GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.",
5920                                                                                   die->GetOffset(),
5921                                                                                   DW_TAG_value_to_name(die->Tag()),
5922                                                                                   die->GetName(this, dwarf_cu));
5923                                     clang_type = ast.GetBasicType(eBasicTypeObjCClass);
5924                                     encoding_data_type = Type::eEncodingIsUID;
5925                                     encoding_uid = LLDB_INVALID_UID;
5926                                     resolve_state = Type::eResolveStateFull;
5927                                 }
5928                                 else if (type_name_const_str == g_objc_type_name_selector)
5929                                 {
5930                                     if (log)
5931                                         GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.",
5932                                                                                   die->GetOffset(),
5933                                                                                   DW_TAG_value_to_name(die->Tag()),
5934                                                                                   die->GetName(this, dwarf_cu));
5935                                     clang_type = ast.GetBasicType(eBasicTypeObjCSel);
5936                                     encoding_data_type = Type::eEncodingIsUID;
5937                                     encoding_uid = LLDB_INVALID_UID;
5938                                     resolve_state = Type::eResolveStateFull;
5939                                 }
5940                             }
5941                             else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid != LLDB_INVALID_UID)
5942                             {
5943                                 // Clang sometimes erroneously emits id as objc_object*.  In that case we fix up the type to "id".
5944
5945                                 DWARFDebugInfoEntry* encoding_die = dwarf_cu->GetDIEPtr(encoding_uid);
5946
5947                                 if (encoding_die && encoding_die->Tag() == DW_TAG_structure_type)
5948                                 {
5949                                     if (const char *struct_name = encoding_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL))
5950                                     {
5951                                         if (!strcmp(struct_name, "objc_object"))
5952                                         {
5953                                             if (log)
5954                                                 GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.",
5955                                                                                           die->GetOffset(),
5956                                                                                           DW_TAG_value_to_name(die->Tag()),
5957                                                                                           die->GetName(this, dwarf_cu));
5958                                             clang_type = ast.GetBasicType(eBasicTypeObjCID);
5959                                             encoding_data_type = Type::eEncodingIsUID;
5960                                             encoding_uid = LLDB_INVALID_UID;
5961                                             resolve_state = Type::eResolveStateFull;
5962                                         }
5963                                     }
5964                                 }
5965                             }
5966                         }
5967                     }
5968
5969                     type_sp.reset( new Type (MakeUserID(die->GetOffset()),
5970                                              this,
5971                                              type_name_const_str,
5972                                              byte_size,
5973                                              NULL,
5974                                              encoding_uid,
5975                                              encoding_data_type,
5976                                              &decl,
5977                                              clang_type,
5978                                              resolve_state));
5979
5980                     m_die_to_type[die] = type_sp.get();
5981
5982 //                  Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false);
5983 //                  if (encoding_type != NULL)
5984 //                  {
5985 //                      if (encoding_type != DIE_IS_BEING_PARSED)
5986 //                          type_sp->SetEncodingType(encoding_type);
5987 //                      else
5988 //                          m_indirect_fixups.push_back(type_sp.get());
5989 //                  }
5990                 }
5991                 break;
5992
5993             case DW_TAG_structure_type:
5994             case DW_TAG_union_type:
5995             case DW_TAG_class_type:
5996                 {
5997                     // Set a bit that lets us know that we are currently parsing this
5998                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
5999                     bool byte_size_valid = false;
6000
6001                     LanguageType class_language = eLanguageTypeUnknown;
6002                     bool is_complete_objc_class = false;
6003                     //bool struct_is_class = false;
6004                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6005                     if (num_attributes > 0)
6006                     {
6007                         uint32_t i;
6008                         for (i=0; i<num_attributes; ++i)
6009                         {
6010                             attr = attributes.AttributeAtIndex(i);
6011                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6012                             {
6013                                 switch (attr)
6014                                 {
6015                                 case DW_AT_decl_file:
6016                                     if (dwarf_cu->DW_AT_decl_file_attributes_are_invalid())
6017                                     {
6018                                         // llvm-gcc outputs invalid DW_AT_decl_file attributes that always
6019                                         // point to the compile unit file, so we clear this invalid value
6020                                         // so that we can still unique types efficiently.
6021                                         decl.SetFile(FileSpec ("<invalid>", false));
6022                                     }
6023                                     else
6024                                         decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned()));
6025                                     break;
6026
6027                                 case DW_AT_decl_line:
6028                                     decl.SetLine(form_value.Unsigned());
6029                                     break;
6030
6031                                 case DW_AT_decl_column:
6032                                     decl.SetColumn(form_value.Unsigned());
6033                                     break;
6034
6035                                 case DW_AT_name:
6036                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
6037                                     type_name_const_str.SetCString(type_name_cstr);
6038                                     break;
6039
6040                                 case DW_AT_byte_size:
6041                                     byte_size = form_value.Unsigned();
6042                                     byte_size_valid = true;
6043                                     break;
6044
6045                                 case DW_AT_accessibility:
6046                                     accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
6047                                     break;
6048
6049                                 case DW_AT_declaration:
6050                                     is_forward_declaration = form_value.Boolean();
6051                                     break;
6052
6053                                 case DW_AT_APPLE_runtime_class:
6054                                     class_language = (LanguageType)form_value.Signed();
6055                                     break;
6056
6057                                 case DW_AT_APPLE_objc_complete_type:
6058                                     is_complete_objc_class = form_value.Signed();
6059                                     break;
6060
6061                                 case DW_AT_allocated:
6062                                 case DW_AT_associated:
6063                                 case DW_AT_data_location:
6064                                 case DW_AT_description:
6065                                 case DW_AT_start_scope:
6066                                 case DW_AT_visibility:
6067                                 default:
6068                                 case DW_AT_sibling:
6069                                     break;
6070                                 }
6071                             }
6072                         }
6073                     }
6074
6075                     // UniqueDWARFASTType is large, so don't create a local variables on the
6076                     // stack, put it on the heap. This function is often called recursively
6077                     // and clang isn't good and sharing the stack space for variables in different blocks.
6078                     std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap(new UniqueDWARFASTType());
6079
6080                     // Only try and unique the type if it has a name.
6081                     if (type_name_const_str &&
6082                         GetUniqueDWARFASTTypeMap().Find (type_name_const_str,
6083                                                          this,
6084                                                          dwarf_cu,
6085                                                          die,
6086                                                          decl,
6087                                                          byte_size_valid ? byte_size : -1,
6088                                                          *unique_ast_entry_ap))
6089                     {
6090                         // We have already parsed this type or from another
6091                         // compile unit. GCC loves to use the "one definition
6092                         // rule" which can result in multiple definitions
6093                         // of the same class over and over in each compile
6094                         // unit.
6095                         type_sp = unique_ast_entry_ap->m_type_sp;
6096                         if (type_sp)
6097                         {
6098                             m_die_to_type[die] = type_sp.get();
6099                             return type_sp;
6100                         }
6101                     }
6102
6103                     DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6104
6105                     int tag_decl_kind = -1;
6106                     AccessType default_accessibility = eAccessNone;
6107                     if (tag == DW_TAG_structure_type)
6108                     {
6109                         tag_decl_kind = clang::TTK_Struct;
6110                         default_accessibility = eAccessPublic;
6111                     }
6112                     else if (tag == DW_TAG_union_type)
6113                     {
6114                         tag_decl_kind = clang::TTK_Union;
6115                         default_accessibility = eAccessPublic;
6116                     }
6117                     else if (tag == DW_TAG_class_type)
6118                     {
6119                         tag_decl_kind = clang::TTK_Class;
6120                         default_accessibility = eAccessPrivate;
6121                     }
6122
6123                     if (byte_size_valid && byte_size == 0 && type_name_cstr &&
6124                         die->HasChildren() == false &&
6125                         sc.comp_unit->GetLanguage() == eLanguageTypeObjC)
6126                     {
6127                         // Work around an issue with clang at the moment where
6128                         // forward declarations for objective C classes are emitted
6129                         // as:
6130                         //  DW_TAG_structure_type [2]
6131                         //  DW_AT_name( "ForwardObjcClass" )
6132                         //  DW_AT_byte_size( 0x00 )
6133                         //  DW_AT_decl_file( "..." )
6134                         //  DW_AT_decl_line( 1 )
6135                         //
6136                         // Note that there is no DW_AT_declaration and there are
6137                         // no children, and the byte size is zero.
6138                         is_forward_declaration = true;
6139                     }
6140
6141                     if (class_language == eLanguageTypeObjC ||
6142                         class_language == eLanguageTypeObjC_plus_plus)
6143                     {
6144                         if (!is_complete_objc_class && Supports_DW_AT_APPLE_objc_complete_type(dwarf_cu))
6145                         {
6146                             // We have a valid eSymbolTypeObjCClass class symbol whose
6147                             // name matches the current objective C class that we
6148                             // are trying to find and this DIE isn't the complete
6149                             // definition (we checked is_complete_objc_class above and
6150                             // know it is false), so the real definition is in here somewhere
6151                             type_sp = FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
6152
6153                             if (!type_sp && GetDebugMapSymfile ())
6154                             {
6155                                 // We weren't able to find a full declaration in
6156                                 // this DWARF, see if we have a declaration anywhere
6157                                 // else...
6158                                 type_sp = m_debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
6159                             }
6160
6161                             if (type_sp)
6162                             {
6163                                 if (log)
6164                                 {
6165                                     GetObjectFile()->GetModule()->LogMessage (log,
6166                                                                               "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64,
6167                                                                               static_cast<void*>(this),
6168                                                                               die->GetOffset(),
6169                                                                               DW_TAG_value_to_name(tag),
6170                                                                               type_name_cstr,
6171                                                                               type_sp->GetID());
6172                                 }
6173
6174                                 // We found a real definition for this type elsewhere
6175                                 // so lets use it and cache the fact that we found
6176                                 // a complete type for this die
6177                                 m_die_to_type[die] = type_sp.get();
6178                                 return type_sp;
6179                             }
6180                         }
6181                     }
6182
6183
6184                     if (is_forward_declaration)
6185                     {
6186                         // We have a forward declaration to a type and we need
6187                         // to try and find a full declaration. We look in the
6188                         // current type index just in case we have a forward
6189                         // declaration followed by an actual declarations in the
6190                         // DWARF. If this fails, we need to look elsewhere...
6191                         if (log)
6192                         {
6193                             GetObjectFile()->GetModule()->LogMessage (log,
6194                                                                       "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type",
6195                                                                       static_cast<void*>(this),
6196                                                                       die->GetOffset(),
6197                                                                       DW_TAG_value_to_name(tag),
6198                                                                       type_name_cstr);
6199                         }
6200
6201                         DWARFDeclContext die_decl_ctx;
6202                         die->GetDWARFDeclContext(this, dwarf_cu, die_decl_ctx);
6203
6204                         //type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str);
6205                         type_sp = FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
6206
6207                         if (!type_sp && GetDebugMapSymfile ())
6208                         {
6209                             // We weren't able to find a full declaration in
6210                             // this DWARF, see if we have a declaration anywhere
6211                             // else...
6212                             type_sp = m_debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
6213                         }
6214
6215                         if (type_sp)
6216                         {
6217                             if (log)
6218                             {
6219                                 GetObjectFile()->GetModule()->LogMessage (log,
6220                                                                           "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64,
6221                                                                           static_cast<void*>(this),
6222                                                                           die->GetOffset(),
6223                                                                           DW_TAG_value_to_name(tag),
6224                                                                           type_name_cstr,
6225                                                                           type_sp->GetID());
6226                             }
6227
6228                             // We found a real definition for this type elsewhere
6229                             // so lets use it and cache the fact that we found
6230                             // a complete type for this die
6231                             m_die_to_type[die] = type_sp.get();
6232                             return type_sp;
6233                         }
6234                     }
6235                     assert (tag_decl_kind != -1);
6236                     bool clang_type_was_created = false;
6237                     clang_type.SetClangType(ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
6238                     if (!clang_type)
6239                     {
6240                         const DWARFDebugInfoEntry *decl_ctx_die;
6241
6242                         clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6243                         if (accessibility == eAccessNone && decl_ctx)
6244                         {
6245                             // Check the decl context that contains this class/struct/union.
6246                             // If it is a class we must give it an accessibility.
6247                             const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind();
6248                             if (DeclKindIsCXXClass (containing_decl_kind))
6249                                 accessibility = default_accessibility;
6250                         }
6251
6252                         ClangASTMetadata metadata;
6253                         metadata.SetUserID(MakeUserID(die->GetOffset()));
6254                         metadata.SetIsDynamicCXXType(ClassOrStructIsVirtual (dwarf_cu, die));
6255
6256                         if (type_name_cstr && strchr (type_name_cstr, '<'))
6257                         {
6258                             ClangASTContext::TemplateParameterInfos template_param_infos;
6259                             if (ParseTemplateParameterInfos (dwarf_cu, die, template_param_infos))
6260                             {
6261                                 clang::ClassTemplateDecl *class_template_decl = ParseClassTemplateDecl (decl_ctx,
6262                                                                                                         accessibility,
6263                                                                                                         type_name_cstr,
6264                                                                                                         tag_decl_kind,
6265                                                                                                         template_param_infos);
6266
6267                                 clang::ClassTemplateSpecializationDecl *class_specialization_decl = ast.CreateClassTemplateSpecializationDecl (decl_ctx,
6268                                                                                                                                                class_template_decl,
6269                                                                                                                                                tag_decl_kind,
6270                                                                                                                                                template_param_infos);
6271                                 clang_type = ast.CreateClassTemplateSpecializationType (class_specialization_decl);
6272                                 clang_type_was_created = true;
6273
6274                                 GetClangASTContext().SetMetadata (class_template_decl, metadata);
6275                                 GetClangASTContext().SetMetadata (class_specialization_decl, metadata);
6276                             }
6277                         }
6278
6279                         if (!clang_type_was_created)
6280                         {
6281                             clang_type_was_created = true;
6282                             clang_type = ast.CreateRecordType (decl_ctx,
6283                                                                accessibility,
6284                                                                type_name_cstr,
6285                                                                tag_decl_kind,
6286                                                                class_language,
6287                                                                &metadata);
6288                         }
6289                     }
6290
6291                     // Store a forward declaration to this class type in case any
6292                     // parameters in any class methods need it for the clang
6293                     // types for function prototypes.
6294                     LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
6295                     type_sp.reset (new Type (MakeUserID(die->GetOffset()),
6296                                              this,
6297                                              type_name_const_str,
6298                                              byte_size,
6299                                              NULL,
6300                                              LLDB_INVALID_UID,
6301                                              Type::eEncodingIsUID,
6302                                              &decl,
6303                                              clang_type,
6304                                              Type::eResolveStateForward));
6305
6306                     type_sp->SetIsCompleteObjCClass(is_complete_objc_class);
6307
6308
6309                     // Add our type to the unique type map so we don't
6310                     // end up creating many copies of the same type over
6311                     // and over in the ASTContext for our module
6312                     unique_ast_entry_ap->m_type_sp = type_sp;
6313                     unique_ast_entry_ap->m_symfile = this;
6314                     unique_ast_entry_ap->m_cu = dwarf_cu;
6315                     unique_ast_entry_ap->m_die = die;
6316                     unique_ast_entry_ap->m_declaration = decl;
6317                     unique_ast_entry_ap->m_byte_size = byte_size;
6318                     GetUniqueDWARFASTTypeMap().Insert (type_name_const_str,
6319                                                        *unique_ast_entry_ap);
6320
6321                     if (is_forward_declaration && die->HasChildren())
6322                     {
6323                         // Check to see if the DIE actually has a definition, some version of GCC will
6324                         // emit DIEs with DW_AT_declaration set to true, but yet still have subprogram,
6325                         // members, or inheritance, so we can't trust it
6326                         const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
6327                         while (child_die)
6328                         {
6329                             switch (child_die->Tag())
6330                             {
6331                                 case DW_TAG_inheritance:
6332                                 case DW_TAG_subprogram:
6333                                 case DW_TAG_member:
6334                                 case DW_TAG_APPLE_property:
6335                                 case DW_TAG_class_type:
6336                                 case DW_TAG_structure_type:
6337                                 case DW_TAG_enumeration_type:
6338                                 case DW_TAG_typedef:
6339                                 case DW_TAG_union_type:
6340                                     child_die = NULL;
6341                                     is_forward_declaration = false;
6342                                     break;
6343                                 default:
6344                                     child_die = child_die->GetSibling();
6345                                     break;
6346                             }
6347                         }
6348                     }
6349
6350                     if (!is_forward_declaration)
6351                     {
6352                         // Always start the definition for a class type so that
6353                         // if the class has child classes or types that require
6354                         // the class to be created for use as their decl contexts
6355                         // the class will be ready to accept these child definitions.
6356                         if (die->HasChildren() == false)
6357                         {
6358                             // No children for this struct/union/class, lets finish it
6359                             clang_type.StartTagDeclarationDefinition ();
6360                             clang_type.CompleteTagDeclarationDefinition ();
6361
6362                             if (tag == DW_TAG_structure_type) // this only applies in C
6363                             {
6364                                 clang::RecordDecl *record_decl = clang_type.GetAsRecordDecl();
6365
6366                                 if (record_decl)
6367                                     m_record_decl_to_layout_map.insert(std::make_pair(record_decl, LayoutInfo()));
6368                             }
6369                         }
6370                         else if (clang_type_was_created)
6371                         {
6372                             // Start the definition if the class is not objective C since
6373                             // the underlying decls respond to isCompleteDefinition(). Objective
6374                             // C decls don't respond to isCompleteDefinition() so we can't
6375                             // start the declaration definition right away. For C++ class/union/structs
6376                             // we want to start the definition in case the class is needed as the
6377                             // declaration context for a contained class or type without the need
6378                             // to complete that type..
6379
6380                             if (class_language != eLanguageTypeObjC &&
6381                                 class_language != eLanguageTypeObjC_plus_plus)
6382                                 clang_type.StartTagDeclarationDefinition ();
6383
6384                             // Leave this as a forward declaration until we need
6385                             // to know the details of the type. lldb_private::Type
6386                             // will automatically call the SymbolFile virtual function
6387                             // "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition(Type *)"
6388                             // When the definition needs to be defined.
6389                             m_forward_decl_die_to_clang_type[die] = clang_type.GetOpaqueQualType();
6390                             m_forward_decl_clang_type_to_die[clang_type.RemoveFastQualifiers().GetOpaqueQualType()] = die;
6391                             clang_type.SetHasExternalStorage (true);
6392                         }
6393                     }
6394
6395                 }
6396                 break;
6397
6398             case DW_TAG_enumeration_type:
6399                 {
6400                     // Set a bit that lets us know that we are currently parsing this
6401                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6402
6403                     lldb::user_id_t encoding_uid = DW_INVALID_OFFSET;
6404
6405                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6406                     if (num_attributes > 0)
6407                     {
6408                         uint32_t i;
6409
6410                         for (i=0; i<num_attributes; ++i)
6411                         {
6412                             attr = attributes.AttributeAtIndex(i);
6413                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6414                             {
6415                                 switch (attr)
6416                                 {
6417                                 case DW_AT_decl_file:       decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6418                                 case DW_AT_decl_line:       decl.SetLine(form_value.Unsigned()); break;
6419                                 case DW_AT_decl_column:     decl.SetColumn(form_value.Unsigned()); break;
6420                                 case DW_AT_name:
6421                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
6422                                     type_name_const_str.SetCString(type_name_cstr);
6423                                     break;
6424                                 case DW_AT_type:            encoding_uid = form_value.Reference(); break;
6425                                 case DW_AT_byte_size:       byte_size = form_value.Unsigned(); break;
6426                                 case DW_AT_accessibility:   break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6427                                 case DW_AT_declaration:     break; //is_forward_declaration = form_value.Boolean(); break;
6428                                 case DW_AT_allocated:
6429                                 case DW_AT_associated:
6430                                 case DW_AT_bit_stride:
6431                                 case DW_AT_byte_stride:
6432                                 case DW_AT_data_location:
6433                                 case DW_AT_description:
6434                                 case DW_AT_start_scope:
6435                                 case DW_AT_visibility:
6436                                 case DW_AT_specification:
6437                                 case DW_AT_abstract_origin:
6438                                 case DW_AT_sibling:
6439                                     break;
6440                                 }
6441                             }
6442                         }
6443
6444                         DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6445
6446                         ClangASTType enumerator_clang_type;
6447                         clang_type.SetClangType (ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
6448                         if (!clang_type)
6449                         {
6450                             if (encoding_uid != DW_INVALID_OFFSET)
6451                             {
6452                                 Type *enumerator_type = ResolveTypeUID(encoding_uid);
6453                                 if (enumerator_type)
6454                                     enumerator_clang_type = enumerator_type->GetClangFullType();
6455                             }
6456
6457                             if (!enumerator_clang_type)
6458                                 enumerator_clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (NULL,
6459                                                                                                       DW_ATE_signed,
6460                                                                                                       byte_size * 8);
6461
6462                             clang_type = ast.CreateEnumerationType (type_name_cstr,
6463                                                                     GetClangDeclContextContainingDIE (dwarf_cu, die, NULL),
6464                                                                     decl,
6465                                                                     enumerator_clang_type);
6466                         }
6467                         else
6468                         {
6469                             enumerator_clang_type = clang_type.GetEnumerationIntegerType ();
6470                         }
6471
6472                         LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
6473
6474                         type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6475                                                  this,
6476                                                  type_name_const_str,
6477                                                  byte_size,
6478                                                  NULL,
6479                                                  encoding_uid,
6480                                                  Type::eEncodingIsUID,
6481                                                  &decl,
6482                                                  clang_type,
6483                                                  Type::eResolveStateForward));
6484
6485                         clang_type.StartTagDeclarationDefinition ();
6486                         if (die->HasChildren())
6487                         {
6488                             SymbolContext cu_sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
6489                             bool is_signed = false;
6490                             enumerator_clang_type.IsIntegerType(is_signed);
6491                             ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), dwarf_cu, die);
6492                         }
6493                         clang_type.CompleteTagDeclarationDefinition ();
6494                     }
6495                 }
6496                 break;
6497
6498             case DW_TAG_inlined_subroutine:
6499             case DW_TAG_subprogram:
6500             case DW_TAG_subroutine_type:
6501                 {
6502                     // Set a bit that lets us know that we are currently parsing this
6503                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6504
6505                     //const char *mangled = NULL;
6506                     dw_offset_t type_die_offset = DW_INVALID_OFFSET;
6507                     bool is_variadic = false;
6508                     bool is_inline = false;
6509                     bool is_static = false;
6510                     bool is_virtual = false;
6511                     bool is_explicit = false;
6512                     bool is_artificial = false;
6513                     dw_offset_t specification_die_offset = DW_INVALID_OFFSET;
6514                     dw_offset_t abstract_origin_die_offset = DW_INVALID_OFFSET;
6515                     dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET;
6516
6517                     unsigned type_quals = 0;
6518                     clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern
6519
6520
6521                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6522                     if (num_attributes > 0)
6523                     {
6524                         uint32_t i;
6525                         for (i=0; i<num_attributes; ++i)
6526                         {
6527                             attr = attributes.AttributeAtIndex(i);
6528                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6529                             {
6530                                 switch (attr)
6531                                 {
6532                                 case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6533                                 case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
6534                                 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6535                                 case DW_AT_name:
6536                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
6537                                     type_name_const_str.SetCString(type_name_cstr);
6538                                     break;
6539
6540                                 case DW_AT_linkage_name:
6541                                 case DW_AT_MIPS_linkage_name:   break; // mangled = form_value.AsCString(&get_debug_str_data()); break;
6542                                 case DW_AT_type:                type_die_offset = form_value.Reference(); break;
6543                                 case DW_AT_accessibility:       accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6544                                 case DW_AT_declaration:         break; // is_forward_declaration = form_value.Boolean(); break;
6545                                 case DW_AT_inline:              is_inline = form_value.Boolean(); break;
6546                                 case DW_AT_virtuality:          is_virtual = form_value.Boolean();  break;
6547                                 case DW_AT_explicit:            is_explicit = form_value.Boolean();  break;
6548                                 case DW_AT_artificial:          is_artificial = form_value.Boolean();  break;
6549
6550
6551                                 case DW_AT_external:
6552                                     if (form_value.Unsigned())
6553                                     {
6554                                         if (storage == clang::SC_None)
6555                                             storage = clang::SC_Extern;
6556                                         else
6557                                             storage = clang::SC_PrivateExtern;
6558                                     }
6559                                     break;
6560
6561                                 case DW_AT_specification:
6562                                     specification_die_offset = form_value.Reference();
6563                                     break;
6564
6565                                 case DW_AT_abstract_origin:
6566                                     abstract_origin_die_offset = form_value.Reference();
6567                                     break;
6568
6569                                 case DW_AT_object_pointer:
6570                                     object_pointer_die_offset = form_value.Reference();
6571                                     break;
6572
6573                                 case DW_AT_allocated:
6574                                 case DW_AT_associated:
6575                                 case DW_AT_address_class:
6576                                 case DW_AT_calling_convention:
6577                                 case DW_AT_data_location:
6578                                 case DW_AT_elemental:
6579                                 case DW_AT_entry_pc:
6580                                 case DW_AT_frame_base:
6581                                 case DW_AT_high_pc:
6582                                 case DW_AT_low_pc:
6583                                 case DW_AT_prototyped:
6584                                 case DW_AT_pure:
6585                                 case DW_AT_ranges:
6586                                 case DW_AT_recursive:
6587                                 case DW_AT_return_addr:
6588                                 case DW_AT_segment:
6589                                 case DW_AT_start_scope:
6590                                 case DW_AT_static_link:
6591                                 case DW_AT_trampoline:
6592                                 case DW_AT_visibility:
6593                                 case DW_AT_vtable_elem_location:
6594                                 case DW_AT_description:
6595                                 case DW_AT_sibling:
6596                                     break;
6597                                 }
6598                             }
6599                         }
6600                     }
6601
6602                     std::string object_pointer_name;
6603                     if (object_pointer_die_offset != DW_INVALID_OFFSET)
6604                     {
6605                         // Get the name from the object pointer die
6606                         StreamString s;
6607                         if (DWARFDebugInfoEntry::GetName (this, dwarf_cu, object_pointer_die_offset, s))
6608                         {
6609                             object_pointer_name.assign(s.GetData());
6610                         }
6611                     }
6612
6613                     DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6614
6615                     ClangASTType return_clang_type;
6616                     Type *func_type = NULL;
6617
6618                     if (type_die_offset != DW_INVALID_OFFSET)
6619                         func_type = ResolveTypeUID(type_die_offset);
6620
6621                     if (func_type)
6622                         return_clang_type = func_type->GetClangForwardType();
6623                     else
6624                         return_clang_type = ast.GetBasicType(eBasicTypeVoid);
6625
6626
6627                     std::vector<ClangASTType> function_param_types;
6628                     std::vector<clang::ParmVarDecl*> function_param_decls;
6629
6630                     // Parse the function children for the parameters
6631
6632                     const DWARFDebugInfoEntry *decl_ctx_die = NULL;
6633                     clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6634                     const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind();
6635
6636                     const bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind);
6637                     // Start off static. This will be set to false in ParseChildParameters(...)
6638                     // if we find a "this" parameters as the first parameter
6639                     if (is_cxx_method)
6640                         is_static = true;
6641
6642                     if (die->HasChildren())
6643                     {
6644                         bool skip_artificial = true;
6645                         ParseChildParameters (sc,
6646                                               containing_decl_ctx,
6647                                               dwarf_cu,
6648                                               die,
6649                                               skip_artificial,
6650                                               is_static,
6651                                               is_variadic,
6652                                               function_param_types,
6653                                               function_param_decls,
6654                                               type_quals);
6655                     }
6656
6657                     // clang_type will get the function prototype clang type after this call
6658                     clang_type = ast.CreateFunctionType (return_clang_type,
6659                                                          function_param_types.data(),
6660                                                          function_param_types.size(),
6661                                                          is_variadic,
6662                                                          type_quals);
6663
6664                     bool ignore_containing_context = false;
6665
6666                     if (type_name_cstr)
6667                     {
6668                         bool type_handled = false;
6669                         if (tag == DW_TAG_subprogram)
6670                         {
6671                             ObjCLanguageRuntime::MethodName objc_method (type_name_cstr, true);
6672                             if (objc_method.IsValid(true))
6673                             {
6674                                 ClangASTType class_opaque_type;
6675                                 ConstString class_name(objc_method.GetClassName());
6676                                 if (class_name)
6677                                 {
6678                                     TypeSP complete_objc_class_type_sp (FindCompleteObjCDefinitionTypeForDIE (NULL, class_name, false));
6679
6680                                     if (complete_objc_class_type_sp)
6681                                     {
6682                                         ClangASTType type_clang_forward_type = complete_objc_class_type_sp->GetClangForwardType();
6683                                         if (type_clang_forward_type.IsObjCObjectOrInterfaceType ())
6684                                             class_opaque_type = type_clang_forward_type;
6685                                     }
6686                                 }
6687
6688                                 if (class_opaque_type)
6689                                 {
6690                                     // If accessibility isn't set to anything valid, assume public for
6691                                     // now...
6692                                     if (accessibility == eAccessNone)
6693                                         accessibility = eAccessPublic;
6694
6695                                     clang::ObjCMethodDecl *objc_method_decl = class_opaque_type.AddMethodToObjCObjectType (type_name_cstr,
6696                                                                                                                            clang_type,
6697                                                                                                                            accessibility,
6698                                                                                                                            is_artificial);
6699                                     type_handled = objc_method_decl != NULL;
6700                                     if (type_handled)
6701                                     {
6702                                         LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die);
6703                                         GetClangASTContext().SetMetadataAsUserID (objc_method_decl, MakeUserID(die->GetOffset()));
6704                                     }
6705                                     else
6706                                     {
6707                                         GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), please file a bug and attach the file at the start of this error message",
6708                                                                                    die->GetOffset(),
6709                                                                                    tag,
6710                                                                                    DW_TAG_value_to_name(tag));
6711                                     }
6712                                 }
6713                             }
6714                             else if (is_cxx_method)
6715                             {
6716                                 // Look at the parent of this DIE and see if is is
6717                                 // a class or struct and see if this is actually a
6718                                 // C++ method
6719                                 Type *class_type = ResolveType (dwarf_cu, decl_ctx_die);
6720                                 if (class_type)
6721                                 {
6722                                     if (class_type->GetID() != MakeUserID(decl_ctx_die->GetOffset()))
6723                                     {
6724                                         // We uniqued the parent class of this function to another class
6725                                         // so we now need to associate all dies under "decl_ctx_die" to
6726                                         // DIEs in the DIE for "class_type"...
6727                                         SymbolFileDWARF *class_symfile = NULL;
6728                                         DWARFCompileUnitSP class_type_cu_sp;
6729                                         const DWARFDebugInfoEntry *class_type_die = NULL;
6730
6731                                         SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
6732                                         if (debug_map_symfile)
6733                                         {
6734                                             class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID()));
6735                                             class_type_die = class_symfile->DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6736                                         }
6737                                         else
6738                                         {
6739                                             class_symfile = this;
6740                                             class_type_die = DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6741                                         }
6742                                         if (class_type_die)
6743                                         {
6744                                             DWARFDIECollection failures;
6745
6746                                             CopyUniqueClassMethodTypes (class_symfile,
6747                                                                         class_type,
6748                                                                         class_type_cu_sp.get(),
6749                                                                         class_type_die,
6750                                                                         dwarf_cu,
6751                                                                         decl_ctx_die,
6752                                                                         failures);
6753
6754                                             // FIXME do something with these failures that's smarter than
6755                                             // just dropping them on the ground.  Unfortunately classes don't
6756                                             // like having stuff added to them after their definitions are
6757                                             // complete...
6758
6759                                             type_ptr = m_die_to_type[die];
6760                                             if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6761                                             {
6762                                                 type_sp = type_ptr->shared_from_this();
6763                                                 break;
6764                                             }
6765                                         }
6766                                     }
6767
6768                                     if (specification_die_offset != DW_INVALID_OFFSET)
6769                                     {
6770                                         // We have a specification which we are going to base our function
6771                                         // prototype off of, so we need this type to be completed so that the
6772                                         // m_die_to_decl_ctx for the method in the specification has a valid
6773                                         // clang decl context.
6774                                         class_type->GetClangForwardType();
6775                                         // If we have a specification, then the function type should have been
6776                                         // made with the specification and not with this die.
6777                                         DWARFCompileUnitSP spec_cu_sp;
6778                                         const DWARFDebugInfoEntry* spec_die = DebugInfo()->GetDIEPtr(specification_die_offset, &spec_cu_sp);
6779                                         clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, spec_die);
6780                                         if (spec_clang_decl_ctx)
6781                                         {
6782                                             LinkDeclContextToDIE(spec_clang_decl_ctx, die);
6783                                         }
6784                                         else
6785                                         {
6786                                             GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x) has no decl\n",
6787                                                                                          MakeUserID(die->GetOffset()),
6788                                                                                          specification_die_offset);
6789                                         }
6790                                         type_handled = true;
6791                                     }
6792                                     else if (abstract_origin_die_offset != DW_INVALID_OFFSET)
6793                                     {
6794                                         // We have a specification which we are going to base our function
6795                                         // prototype off of, so we need this type to be completed so that the
6796                                         // m_die_to_decl_ctx for the method in the abstract origin has a valid
6797                                         // clang decl context.
6798                                         class_type->GetClangForwardType();
6799
6800                                         DWARFCompileUnitSP abs_cu_sp;
6801                                         const DWARFDebugInfoEntry* abs_die = DebugInfo()->GetDIEPtr(abstract_origin_die_offset, &abs_cu_sp);
6802                                         clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, abs_die);
6803                                         if (abs_clang_decl_ctx)
6804                                         {
6805                                             LinkDeclContextToDIE (abs_clang_decl_ctx, die);
6806                                         }
6807                                         else
6808                                         {
6809                                             GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x) has no decl\n",
6810                                                                                          MakeUserID(die->GetOffset()),
6811                                                                                          abstract_origin_die_offset);
6812                                         }
6813                                         type_handled = true;
6814                                     }
6815                                     else
6816                                     {
6817                                         ClangASTType class_opaque_type = class_type->GetClangForwardType();
6818                                         if (class_opaque_type.IsCXXClassType ())
6819                                         {
6820                                             if (class_opaque_type.IsBeingDefined ())
6821                                             {
6822                                                 // Neither GCC 4.2 nor clang++ currently set a valid accessibility
6823                                                 // in the DWARF for C++ methods... Default to public for now...
6824                                                 if (accessibility == eAccessNone)
6825                                                     accessibility = eAccessPublic;
6826
6827                                                 if (!is_static && !die->HasChildren())
6828                                                 {
6829                                                     // We have a C++ member function with no children (this pointer!)
6830                                                     // and clang will get mad if we try and make a function that isn't
6831                                                     // well formed in the DWARF, so we will just skip it...
6832                                                     type_handled = true;
6833                                                 }
6834                                                 else
6835                                                 {
6836                                                     clang::CXXMethodDecl *cxx_method_decl;
6837                                                     // REMOVE THE CRASH DESCRIPTION BELOW
6838                                                     Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s",
6839                                                                                          type_name_cstr,
6840                                                                                          class_type->GetName().GetCString(),
6841                                                                                          MakeUserID(die->GetOffset()),
6842                                                                                          m_obj_file->GetFileSpec().GetPath().c_str());
6843
6844                                                     const bool is_attr_used = false;
6845
6846                                                     cxx_method_decl = class_opaque_type.AddMethodToCXXRecordType (type_name_cstr,
6847                                                                                                                   clang_type,
6848                                                                                                                   accessibility,
6849                                                                                                                   is_virtual,
6850                                                                                                                   is_static,
6851                                                                                                                   is_inline,
6852                                                                                                                   is_explicit,
6853                                                                                                                   is_attr_used,
6854                                                                                                                   is_artificial);
6855
6856                                                     type_handled = cxx_method_decl != NULL;
6857
6858                                                     if (type_handled)
6859                                                     {
6860                                                         LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die);
6861
6862                                                         Host::SetCrashDescription (NULL);
6863
6864
6865                                                         ClangASTMetadata metadata;
6866                                                         metadata.SetUserID(MakeUserID(die->GetOffset()));
6867
6868                                                         if (!object_pointer_name.empty())
6869                                                         {
6870                                                             metadata.SetObjectPtrName(object_pointer_name.c_str());
6871                                                             if (log)
6872                                                                 log->Printf ("Setting object pointer name: %s on method object %p.\n",
6873                                                                              object_pointer_name.c_str(),
6874                                                                              static_cast<void*>(cxx_method_decl));
6875                                                         }
6876                                                         GetClangASTContext().SetMetadata (cxx_method_decl, metadata);
6877                                                     }
6878                                                     else
6879                                                     {
6880                                                         ignore_containing_context = true;
6881                                                     }
6882                                                 }
6883                                             }
6884                                             else
6885                                             {
6886                                                 // We were asked to parse the type for a method in a class, yet the
6887                                                 // class hasn't been asked to complete itself through the
6888                                                 // clang::ExternalASTSource protocol, so we need to just have the
6889                                                 // class complete itself and do things the right way, then our
6890                                                 // DIE should then have an entry in the m_die_to_type map. First
6891                                                 // we need to modify the m_die_to_type so it doesn't think we are
6892                                                 // trying to parse this DIE anymore...
6893                                                 m_die_to_type[die] = NULL;
6894
6895                                                 // Now we get the full type to force our class type to complete itself
6896                                                 // using the clang::ExternalASTSource protocol which will parse all
6897                                                 // base classes and all methods (including the method for this DIE).
6898                                                 class_type->GetClangFullType();
6899
6900                                                 // The type for this DIE should have been filled in the function call above
6901                                                 type_ptr = m_die_to_type[die];
6902                                                 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6903                                                 {
6904                                                     type_sp = type_ptr->shared_from_this();
6905                                                     break;
6906                                                 }
6907
6908                                                 // FIXME This is fixing some even uglier behavior but we really need to
6909                                                 // uniq the methods of each class as well as the class itself.
6910                                                 // <rdar://problem/11240464>
6911                                                 type_handled = true;
6912                                             }
6913                                         }
6914                                     }
6915                                 }
6916                             }
6917                         }
6918
6919                         if (!type_handled)
6920                         {
6921                             // We just have a function that isn't part of a class
6922                             clang::FunctionDecl *function_decl = ast.CreateFunctionDeclaration (ignore_containing_context ? GetClangASTContext().GetTranslationUnitDecl() : containing_decl_ctx,
6923                                                                                                 type_name_cstr,
6924                                                                                                 clang_type,
6925                                                                                                 storage,
6926                                                                                                 is_inline);
6927
6928 //                            if (template_param_infos.GetSize() > 0)
6929 //                            {
6930 //                                clang::FunctionTemplateDecl *func_template_decl = ast.CreateFunctionTemplateDecl (containing_decl_ctx,
6931 //                                                                                                                  function_decl,
6932 //                                                                                                                  type_name_cstr,
6933 //                                                                                                                  template_param_infos);
6934 //
6935 //                                ast.CreateFunctionTemplateSpecializationInfo (function_decl,
6936 //                                                                              func_template_decl,
6937 //                                                                              template_param_infos);
6938 //                            }
6939                             // Add the decl to our DIE to decl context map
6940                             assert (function_decl);
6941                             LinkDeclContextToDIE(function_decl, die);
6942                             if (!function_param_decls.empty())
6943                                 ast.SetFunctionParameters (function_decl,
6944                                                            &function_param_decls.front(),
6945                                                            function_param_decls.size());
6946
6947                             ClangASTMetadata metadata;
6948                             metadata.SetUserID(MakeUserID(die->GetOffset()));
6949
6950                             if (!object_pointer_name.empty())
6951                             {
6952                                 metadata.SetObjectPtrName(object_pointer_name.c_str());
6953                                 if (log)
6954                                     log->Printf ("Setting object pointer name: %s on function object %p.",
6955                                                  object_pointer_name.c_str(),
6956                                                  static_cast<void*>(function_decl));
6957                             }
6958                             GetClangASTContext().SetMetadata (function_decl, metadata);
6959                         }
6960                     }
6961                     type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6962                                              this,
6963                                              type_name_const_str,
6964                                              0,
6965                                              NULL,
6966                                              LLDB_INVALID_UID,
6967                                              Type::eEncodingIsUID,
6968                                              &decl,
6969                                              clang_type,
6970                                              Type::eResolveStateFull));
6971                     assert(type_sp.get());
6972                 }
6973                 break;
6974
6975             case DW_TAG_array_type:
6976                 {
6977                     // Set a bit that lets us know that we are currently parsing this
6978                     m_die_to_type[die] = DIE_IS_BEING_PARSED;
6979
6980                     lldb::user_id_t type_die_offset = DW_INVALID_OFFSET;
6981                     int64_t first_index = 0;
6982                     uint32_t byte_stride = 0;
6983                     uint32_t bit_stride = 0;
6984                     bool is_vector = false;
6985                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6986
6987                     if (num_attributes > 0)
6988                     {
6989                         uint32_t i;
6990                         for (i=0; i<num_attributes; ++i)
6991                         {
6992                             attr = attributes.AttributeAtIndex(i);
6993                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6994                             {
6995                                 switch (attr)
6996                                 {
6997                                 case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6998                                 case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
6999                                 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
7000                                 case DW_AT_name:
7001                                     type_name_cstr = form_value.AsCString(&get_debug_str_data());
7002                                     type_name_const_str.SetCString(type_name_cstr);
7003                                     break;
7004
7005                                 case DW_AT_type:            type_die_offset = form_value.Reference(); break;
7006                                 case DW_AT_byte_size:       break; // byte_size = form_value.Unsigned(); break;
7007                                 case DW_AT_byte_stride:     byte_stride = form_value.Unsigned(); break;
7008                                 case DW_AT_bit_stride:      bit_stride = form_value.Unsigned(); break;
7009                                 case DW_AT_GNU_vector:      is_vector = form_value.Boolean(); break;
7010                                 case DW_AT_accessibility:   break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
7011                                 case DW_AT_declaration:     break; // is_forward_declaration = form_value.Boolean(); break;
7012                                 case DW_AT_allocated:
7013                                 case DW_AT_associated:
7014                                 case DW_AT_data_location:
7015                                 case DW_AT_description:
7016                                 case DW_AT_ordering:
7017                                 case DW_AT_start_scope:
7018                                 case DW_AT_visibility:
7019                                 case DW_AT_specification:
7020                                 case DW_AT_abstract_origin:
7021                                 case DW_AT_sibling:
7022                                     break;
7023                                 }
7024                             }
7025                         }
7026
7027                         DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
7028
7029                         Type *element_type = ResolveTypeUID(type_die_offset);
7030
7031                         if (element_type)
7032                         {
7033                             std::vector<uint64_t> element_orders;
7034                             ParseChildArrayInfo(sc, dwarf_cu, die, first_index, element_orders, byte_stride, bit_stride);
7035                             if (byte_stride == 0 && bit_stride == 0)
7036                                 byte_stride = element_type->GetByteSize();
7037                             ClangASTType array_element_type = element_type->GetClangForwardType();
7038                             uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride;
7039                             if (element_orders.size() > 0)
7040                             {
7041                                 uint64_t num_elements = 0;
7042                                 std::vector<uint64_t>::const_reverse_iterator pos;
7043                                 std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend();
7044                                 for (pos = element_orders.rbegin(); pos != end; ++pos)
7045                                 {
7046                                     num_elements = *pos;
7047                                     clang_type = ast.CreateArrayType (array_element_type,
7048                                                                       num_elements,
7049                                                                       is_vector);
7050                                     array_element_type = clang_type;
7051                                     array_element_bit_stride = num_elements ?
7052                                                                array_element_bit_stride * num_elements :
7053                                                                array_element_bit_stride;
7054                                 }
7055                             }
7056                             else
7057                             {
7058                                 clang_type = ast.CreateArrayType (array_element_type, 0, is_vector);
7059                             }
7060                             ConstString empty_name;
7061                             type_sp.reset( new Type (MakeUserID(die->GetOffset()),
7062                                                      this,
7063                                                      empty_name,
7064                                                      array_element_bit_stride / 8,
7065                                                      NULL,
7066                                                      type_die_offset,
7067                                                      Type::eEncodingIsUID,
7068                                                      &decl,
7069                                                      clang_type,
7070                                                      Type::eResolveStateFull));
7071                             type_sp->SetEncodingType (element_type);
7072                         }
7073                     }
7074                 }
7075                 break;
7076
7077             case DW_TAG_ptr_to_member_type:
7078                 {
7079                     dw_offset_t type_die_offset = DW_INVALID_OFFSET;
7080                     dw_offset_t containing_type_die_offset = DW_INVALID_OFFSET;
7081
7082                     const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
7083
7084                     if (num_attributes > 0) {
7085                         uint32_t i;
7086                         for (i=0; i<num_attributes; ++i)
7087                         {
7088                             attr = attributes.AttributeAtIndex(i);
7089                             if (attributes.ExtractFormValueAtIndex(this, i, form_value))
7090                             {
7091                                 switch (attr)
7092                                 {
7093                                     case DW_AT_type:
7094                                         type_die_offset = form_value.Reference(); break;
7095                                     case DW_AT_containing_type:
7096                                         containing_type_die_offset = form_value.Reference(); break;
7097                                 }
7098                             }
7099                         }
7100
7101                         Type *pointee_type = ResolveTypeUID(type_die_offset);
7102                         Type *class_type = ResolveTypeUID(containing_type_die_offset);
7103
7104                         ClangASTType pointee_clang_type = pointee_type->GetClangForwardType();
7105                         ClangASTType class_clang_type = class_type->GetClangLayoutType();
7106
7107                         clang_type = pointee_clang_type.CreateMemberPointerType(class_clang_type);
7108
7109                         byte_size = clang_type.GetByteSize(nullptr);
7110
7111                         type_sp.reset( new Type (MakeUserID(die->GetOffset()),
7112                                                  this,
7113                                                  type_name_const_str,
7114                                                  byte_size,
7115                                                  NULL,
7116                                                  LLDB_INVALID_UID,
7117                                                  Type::eEncodingIsUID,
7118                                                  NULL,
7119                                                  clang_type,
7120                                                  Type::eResolveStateForward));
7121                     }
7122
7123                     break;
7124                 }
7125             default:
7126                 GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and attach the file at the start of this error message",
7127                                                            die->GetOffset(),
7128                                                            tag,
7129                                                            DW_TAG_value_to_name(tag));
7130                 break;
7131             }
7132
7133             if (type_sp.get())
7134             {
7135                 const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7136                 dw_tag_t sc_parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7137
7138                 SymbolContextScope * symbol_context_scope = NULL;
7139                 if (sc_parent_tag == DW_TAG_compile_unit)
7140                 {
7141                     symbol_context_scope = sc.comp_unit;
7142                 }
7143                 else if (sc.function != NULL && sc_parent_die)
7144                 {
7145                     symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7146                     if (symbol_context_scope == NULL)
7147                         symbol_context_scope = sc.function;
7148                 }
7149
7150                 if (symbol_context_scope != NULL)
7151                 {
7152                     type_sp->SetSymbolContextScope(symbol_context_scope);
7153                 }
7154
7155                 // We are ready to put this type into the uniqued list up at the module level
7156                 type_list->Insert (type_sp);
7157
7158                 m_die_to_type[die] = type_sp.get();
7159             }
7160         }
7161         else if (type_ptr != DIE_IS_BEING_PARSED)
7162         {
7163             type_sp = type_ptr->shared_from_this();
7164         }
7165     }
7166     return type_sp;
7167 }
7168
7169 size_t
7170 SymbolFileDWARF::ParseTypes
7171 (
7172     const SymbolContext& sc,
7173     DWARFCompileUnit* dwarf_cu,
7174     const DWARFDebugInfoEntry *die,
7175     bool parse_siblings,
7176     bool parse_children
7177 )
7178 {
7179     size_t types_added = 0;
7180     while (die != NULL)
7181     {
7182         bool type_is_new = false;
7183         if (ParseType(sc, dwarf_cu, die, &type_is_new).get())
7184         {
7185             if (type_is_new)
7186                 ++types_added;
7187         }
7188
7189         if (parse_children && die->HasChildren())
7190         {
7191             if (die->Tag() == DW_TAG_subprogram)
7192             {
7193                 SymbolContext child_sc(sc);
7194                 child_sc.function = sc.comp_unit->FindFunctionByUID(MakeUserID(die->GetOffset())).get();
7195                 types_added += ParseTypes(child_sc, dwarf_cu, die->GetFirstChild(), true, true);
7196             }
7197             else
7198                 types_added += ParseTypes(sc, dwarf_cu, die->GetFirstChild(), true, true);
7199         }
7200
7201         if (parse_siblings)
7202             die = die->GetSibling();
7203         else
7204             die = NULL;
7205     }
7206     return types_added;
7207 }
7208
7209
7210 size_t
7211 SymbolFileDWARF::ParseFunctionBlocks (const SymbolContext &sc)
7212 {
7213     assert(sc.comp_unit && sc.function);
7214     size_t functions_added = 0;
7215     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
7216     if (dwarf_cu)
7217     {
7218         dw_offset_t function_die_offset = sc.function->GetID();
7219         const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(function_die_offset);
7220         if (function_die)
7221         {
7222             ParseFunctionBlocks(sc, &sc.function->GetBlock (false), dwarf_cu, function_die, LLDB_INVALID_ADDRESS, 0);
7223         }
7224     }
7225
7226     return functions_added;
7227 }
7228
7229
7230 size_t
7231 SymbolFileDWARF::ParseTypes (const SymbolContext &sc)
7232 {
7233     // At least a compile unit must be valid
7234     assert(sc.comp_unit);
7235     size_t types_added = 0;
7236     DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
7237     if (dwarf_cu)
7238     {
7239         if (sc.function)
7240         {
7241             dw_offset_t function_die_offset = sc.function->GetID();
7242             const DWARFDebugInfoEntry *func_die = dwarf_cu->GetDIEPtr(function_die_offset);
7243             if (func_die && func_die->HasChildren())
7244             {
7245                 types_added = ParseTypes(sc, dwarf_cu, func_die->GetFirstChild(), true, true);
7246             }
7247         }
7248         else
7249         {
7250             const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->DIE();
7251             if (dwarf_cu_die && dwarf_cu_die->HasChildren())
7252             {
7253                 types_added = ParseTypes(sc, dwarf_cu, dwarf_cu_die->GetFirstChild(), true, true);
7254             }
7255         }
7256     }
7257
7258     return types_added;
7259 }
7260
7261 size_t
7262 SymbolFileDWARF::ParseVariablesForContext (const SymbolContext& sc)
7263 {
7264     if (sc.comp_unit != NULL)
7265     {
7266         DWARFDebugInfo* info = DebugInfo();
7267         if (info == NULL)
7268             return 0;
7269
7270         if (sc.function)
7271         {
7272             DWARFCompileUnit* dwarf_cu = info->GetCompileUnitContainingDIE(sc.function->GetID()).get();
7273
7274             if (dwarf_cu == NULL)
7275                 return 0;
7276
7277             const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(sc.function->GetID());
7278
7279             dw_addr_t func_lo_pc = function_die->GetAttributeValueAsUnsigned (this, dwarf_cu, DW_AT_low_pc, LLDB_INVALID_ADDRESS);
7280             if (func_lo_pc != LLDB_INVALID_ADDRESS)
7281             {
7282                 const size_t num_variables = ParseVariables(sc, dwarf_cu, func_lo_pc, function_die->GetFirstChild(), true, true);
7283
7284                 // Let all blocks know they have parse all their variables
7285                 sc.function->GetBlock (false).SetDidParseVariables (true, true);
7286                 return num_variables;
7287             }
7288         }
7289         else if (sc.comp_unit)
7290         {
7291             DWARFCompileUnit* dwarf_cu = info->GetCompileUnit(sc.comp_unit->GetID()).get();
7292
7293             if (dwarf_cu == NULL)
7294                 return 0;
7295
7296             uint32_t vars_added = 0;
7297             VariableListSP variables (sc.comp_unit->GetVariableList(false));
7298
7299             if (variables.get() == NULL)
7300             {
7301                 variables.reset(new VariableList());
7302                 sc.comp_unit->SetVariableList(variables);
7303
7304                 DWARFCompileUnit* match_dwarf_cu = NULL;
7305                 const DWARFDebugInfoEntry* die = NULL;
7306                 DIEArray die_offsets;
7307                 if (m_using_apple_tables)
7308                 {
7309                     if (m_apple_names_ap.get())
7310                     {
7311                         DWARFMappedHash::DIEInfoArray hash_data_array;
7312                         if (m_apple_names_ap->AppendAllDIEsInRange (dwarf_cu->GetOffset(),
7313                                                                     dwarf_cu->GetNextCompileUnitOffset(),
7314                                                                     hash_data_array))
7315                         {
7316                             DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
7317                         }
7318                     }
7319                 }
7320                 else
7321                 {
7322                     // Index if we already haven't to make sure the compile units
7323                     // get indexed and make their global DIE index list
7324                     if (!m_indexed)
7325                         Index ();
7326
7327                     m_global_index.FindAllEntriesForCompileUnit (dwarf_cu->GetOffset(),
7328                                                                  dwarf_cu->GetNextCompileUnitOffset(),
7329                                                                  die_offsets);
7330                 }
7331
7332                 const size_t num_matches = die_offsets.size();
7333                 if (num_matches)
7334                 {
7335                     DWARFDebugInfo* debug_info = DebugInfo();
7336                     for (size_t i=0; i<num_matches; ++i)
7337                     {
7338                         const dw_offset_t die_offset = die_offsets[i];
7339                         die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &match_dwarf_cu);
7340                         if (die)
7341                         {
7342                             VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, LLDB_INVALID_ADDRESS));
7343                             if (var_sp)
7344                             {
7345                                 variables->AddVariableIfUnique (var_sp);
7346                                 ++vars_added;
7347                             }
7348                         }
7349                         else
7350                         {
7351                             if (m_using_apple_tables)
7352                             {
7353                                 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x)\n", die_offset);
7354                             }
7355                         }
7356
7357                     }
7358                 }
7359             }
7360             return vars_added;
7361         }
7362     }
7363     return 0;
7364 }
7365
7366
7367 VariableSP
7368 SymbolFileDWARF::ParseVariableDIE
7369 (
7370     const SymbolContext& sc,
7371     DWARFCompileUnit* dwarf_cu,
7372     const DWARFDebugInfoEntry *die,
7373     const lldb::addr_t func_low_pc
7374 )
7375 {
7376     VariableSP var_sp (m_die_to_variable_sp[die]);
7377     if (var_sp)
7378         return var_sp;  // Already been parsed!
7379
7380     const dw_tag_t tag = die->Tag();
7381     ModuleSP module = GetObjectFile()->GetModule();
7382
7383     if ((tag == DW_TAG_variable) ||
7384         (tag == DW_TAG_constant) ||
7385         (tag == DW_TAG_formal_parameter && sc.function))
7386     {
7387         DWARFDebugInfoEntry::Attributes attributes;
7388         const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
7389         if (num_attributes > 0)
7390         {
7391             const char *name = NULL;
7392             const char *mangled = NULL;
7393             Declaration decl;
7394             uint32_t i;
7395             lldb::user_id_t type_uid = LLDB_INVALID_UID;
7396             DWARFExpression location;
7397             bool is_external = false;
7398             bool is_artificial = false;
7399             bool location_is_const_value_data = false;
7400             bool has_explicit_location = false;
7401             DWARFFormValue const_value;
7402             //AccessType accessibility = eAccessNone;
7403
7404             for (i=0; i<num_attributes; ++i)
7405             {
7406                 dw_attr_t attr = attributes.AttributeAtIndex(i);
7407                 DWARFFormValue form_value;
7408
7409                 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
7410                 {
7411                     switch (attr)
7412                     {
7413                     case DW_AT_decl_file:   decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
7414                     case DW_AT_decl_line:   decl.SetLine(form_value.Unsigned()); break;
7415                     case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
7416                     case DW_AT_name:        name = form_value.AsCString(&get_debug_str_data()); break;
7417                     case DW_AT_linkage_name:
7418                     case DW_AT_MIPS_linkage_name: mangled = form_value.AsCString(&get_debug_str_data()); break;
7419                     case DW_AT_type:        type_uid = form_value.Reference(); break;
7420                     case DW_AT_external:    is_external = form_value.Boolean(); break;
7421                     case DW_AT_const_value:
7422                         // If we have already found a DW_AT_location attribute, ignore this attribute.
7423                         if (!has_explicit_location)
7424                         {
7425                             location_is_const_value_data = true;
7426                             // The constant value will be either a block, a data value or a string.
7427                             const DWARFDataExtractor& debug_info_data = get_debug_info_data();
7428                             if (DWARFFormValue::IsBlockForm(form_value.Form()))
7429                             {
7430                                 // Retrieve the value as a block expression.
7431                                 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7432                                 uint32_t block_length = form_value.Unsigned();
7433                                 location.CopyOpcodeData(module, debug_info_data, block_offset, block_length);
7434                             }
7435                             else if (DWARFFormValue::IsDataForm(form_value.Form()))
7436                             {
7437                                 // Retrieve the value as a data expression.
7438                                 const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (attributes.CompileUnitAtIndex(i)->GetAddressByteSize(), attributes.CompileUnitAtIndex(i)->IsDWARF64());
7439                                 uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7440                                 uint32_t data_length = fixed_form_sizes[form_value.Form()];
7441                                 if (data_length == 0)
7442                                 {
7443                                     const uint8_t *data_pointer = form_value.BlockData();
7444                                     if (data_pointer)
7445                                     {
7446                                         form_value.Unsigned();
7447                                     }
7448                                     else if (DWARFFormValue::IsDataForm(form_value.Form()))
7449                                     {
7450                                         // we need to get the byte size of the type later after we create the variable
7451                                         const_value = form_value;
7452                                     }
7453                                 }
7454                                 else
7455                                     location.CopyOpcodeData(module, debug_info_data, data_offset, data_length);
7456                             }
7457                             else
7458                             {
7459                                 // Retrieve the value as a string expression.
7460                                 if (form_value.Form() == DW_FORM_strp)
7461                                 {
7462                                     const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (attributes.CompileUnitAtIndex(i)->GetAddressByteSize(), attributes.CompileUnitAtIndex(i)->IsDWARF64());
7463                                     uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7464                                     uint32_t data_length = fixed_form_sizes[form_value.Form()];
7465                                     location.CopyOpcodeData(module, debug_info_data, data_offset, data_length);
7466                                 }
7467                                 else
7468                                 {
7469                                     const char *str = form_value.AsCString(&debug_info_data);
7470                                     uint32_t string_offset = str - (const char *)debug_info_data.GetDataStart();
7471                                     uint32_t string_length = strlen(str) + 1;
7472                                     location.CopyOpcodeData(module, debug_info_data, string_offset, string_length);
7473                                 }
7474                             }
7475                         }
7476                         break;
7477                     case DW_AT_location:
7478                         {
7479                             location_is_const_value_data = false;
7480                             has_explicit_location = true;
7481                             if (form_value.BlockData())
7482                             {
7483                                 const DWARFDataExtractor& debug_info_data = get_debug_info_data();
7484
7485                                 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7486                                 uint32_t block_length = form_value.Unsigned();
7487                                 location.CopyOpcodeData(module, get_debug_info_data(), block_offset, block_length);
7488                             }
7489                             else
7490                             {
7491                                 const DWARFDataExtractor&    debug_loc_data = get_debug_loc_data();
7492                                 const dw_offset_t debug_loc_offset = form_value.Unsigned();
7493
7494                                 size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset);
7495                                 if (loc_list_length > 0)
7496                                 {
7497                                     location.CopyOpcodeData(module, debug_loc_data, debug_loc_offset, loc_list_length);
7498                                     assert (func_low_pc != LLDB_INVALID_ADDRESS);
7499                                     location.SetLocationListSlide (func_low_pc - attributes.CompileUnitAtIndex(i)->GetBaseAddress());
7500                                 }
7501                             }
7502                         }
7503                         break;
7504
7505                     case DW_AT_artificial:      is_artificial = form_value.Boolean(); break;
7506                     case DW_AT_accessibility:   break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
7507                     case DW_AT_declaration:
7508                     case DW_AT_description:
7509                     case DW_AT_endianity:
7510                     case DW_AT_segment:
7511                     case DW_AT_start_scope:
7512                     case DW_AT_visibility:
7513                     default:
7514                     case DW_AT_abstract_origin:
7515                     case DW_AT_sibling:
7516                     case DW_AT_specification:
7517                         break;
7518                     }
7519                 }
7520             }
7521
7522             ValueType scope = eValueTypeInvalid;
7523
7524             const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7525             dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7526             SymbolContextScope * symbol_context_scope = NULL;
7527
7528             if (!mangled)
7529             {
7530                 // LLDB relies on the mangled name (DW_TAG_linkage_name or DW_AT_MIPS_linkage_name) to
7531                 // generate fully qualified names of global variables with commands like "frame var j".
7532                 // For example, if j were an int variable holding a value 4 and declared in a namespace
7533                 // B which in turn is contained in a namespace A, the command "frame var j" returns
7534                 // "(int) A::B::j = 4". If the compiler does not emit a linkage name, we should be able
7535                 // to generate a fully qualified name from the declaration context.
7536                 if (die->GetParent()->Tag() == DW_TAG_compile_unit &&
7537                     LanguageRuntime::LanguageIsCPlusPlus(dwarf_cu->GetLanguageType()))
7538                 {
7539                     DWARFDeclContext decl_ctx;
7540
7541                     die->GetDWARFDeclContext(this, dwarf_cu, decl_ctx);
7542                     mangled = decl_ctx.GetQualifiedNameAsConstString().GetCString();
7543                 }
7544             }
7545
7546             // DWARF doesn't specify if a DW_TAG_variable is a local, global
7547             // or static variable, so we have to do a little digging by
7548             // looking at the location of a variable to see if it contains
7549             // a DW_OP_addr opcode _somewhere_ in the definition. I say
7550             // somewhere because clang likes to combine small global variables
7551             // into the same symbol and have locations like:
7552             // DW_OP_addr(0x1000), DW_OP_constu(2), DW_OP_plus
7553             // So if we don't have a DW_TAG_formal_parameter, we can look at
7554             // the location to see if it contains a DW_OP_addr opcode, and
7555             // then we can correctly classify  our variables.
7556             if (tag == DW_TAG_formal_parameter)
7557                 scope = eValueTypeVariableArgument;
7558             else
7559             {
7560                 bool op_error = false;
7561                 // Check if the location has a DW_OP_addr with any address value...
7562                 lldb::addr_t location_DW_OP_addr = LLDB_INVALID_ADDRESS;
7563                 if (!location_is_const_value_data)
7564                 {
7565                     location_DW_OP_addr = location.GetLocation_DW_OP_addr (0, op_error);
7566                     if (op_error)
7567                     {
7568                         StreamString strm;
7569                         location.DumpLocationForAddress (&strm, eDescriptionLevelFull, 0, 0, NULL);
7570                         GetObjectFile()->GetModule()->ReportError ("0x%8.8x: %s has an invalid location: %s", die->GetOffset(), DW_TAG_value_to_name(die->Tag()), strm.GetString().c_str());
7571                     }
7572                 }
7573
7574                 if (location_DW_OP_addr != LLDB_INVALID_ADDRESS)
7575                 {
7576                     if (is_external)
7577                         scope = eValueTypeVariableGlobal;
7578                     else
7579                         scope = eValueTypeVariableStatic;
7580
7581
7582                     SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile ();
7583
7584                     if (debug_map_symfile)
7585                     {
7586                         // When leaving the DWARF in the .o files on darwin,
7587                         // when we have a global variable that wasn't initialized,
7588                         // the .o file might not have allocated a virtual
7589                         // address for the global variable. In this case it will
7590                         // have created a symbol for the global variable
7591                         // that is undefined/data and external and the value will
7592                         // be the byte size of the variable. When we do the
7593                         // address map in SymbolFileDWARFDebugMap we rely on
7594                         // having an address, we need to do some magic here
7595                         // so we can get the correct address for our global
7596                         // variable. The address for all of these entries
7597                         // will be zero, and there will be an undefined symbol
7598                         // in this object file, and the executable will have
7599                         // a matching symbol with a good address. So here we
7600                         // dig up the correct address and replace it in the
7601                         // location for the variable, and set the variable's
7602                         // symbol context scope to be that of the main executable
7603                         // so the file address will resolve correctly.
7604                         bool linked_oso_file_addr = false;
7605                         if (is_external && location_DW_OP_addr == 0)
7606                         {
7607                             // we have a possible uninitialized extern global
7608                             ConstString const_name(mangled ? mangled : name);
7609                             ObjectFile *debug_map_objfile = debug_map_symfile->GetObjectFile();
7610                             if (debug_map_objfile)
7611                             {
7612                                 Symtab *debug_map_symtab = debug_map_objfile->GetSymtab();
7613                                 if (debug_map_symtab)
7614                                 {
7615                                     Symbol *exe_symbol = debug_map_symtab->FindFirstSymbolWithNameAndType (const_name,
7616                                                                                                            eSymbolTypeData,
7617                                                                                                            Symtab::eDebugYes,
7618                                                                                                            Symtab::eVisibilityExtern);
7619                                     if (exe_symbol)
7620                                     {
7621                                         if (exe_symbol->ValueIsAddress())
7622                                         {
7623                                             const addr_t exe_file_addr = exe_symbol->GetAddressRef().GetFileAddress();
7624                                             if (exe_file_addr != LLDB_INVALID_ADDRESS)
7625                                             {
7626                                                 if (location.Update_DW_OP_addr (exe_file_addr))
7627                                                 {
7628                                                     linked_oso_file_addr = true;
7629                                                     symbol_context_scope = exe_symbol;
7630                                                 }
7631                                             }
7632                                         }
7633                                     }
7634                                 }
7635                             }
7636                         }
7637
7638                         if (!linked_oso_file_addr)
7639                         {
7640                             // The DW_OP_addr is not zero, but it contains a .o file address which
7641                             // needs to be linked up correctly.
7642                             const lldb::addr_t exe_file_addr = debug_map_symfile->LinkOSOFileAddress(this, location_DW_OP_addr);
7643                             if (exe_file_addr != LLDB_INVALID_ADDRESS)
7644                             {
7645                                 // Update the file address for this variable
7646                                 location.Update_DW_OP_addr (exe_file_addr);
7647                             }
7648                             else
7649                             {
7650                                 // Variable didn't make it into the final executable
7651                                 return var_sp;
7652                             }
7653                         }
7654                     }
7655                 }
7656                 else
7657                 {
7658                     scope = eValueTypeVariableLocal;
7659                 }
7660             }
7661
7662             if (symbol_context_scope == NULL)
7663             {
7664                 switch (parent_tag)
7665                 {
7666                 case DW_TAG_subprogram:
7667                 case DW_TAG_inlined_subroutine:
7668                 case DW_TAG_lexical_block:
7669                     if (sc.function)
7670                     {
7671                         symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7672                         if (symbol_context_scope == NULL)
7673                             symbol_context_scope = sc.function;
7674                     }
7675                     break;
7676
7677                 default:
7678                     symbol_context_scope = sc.comp_unit;
7679                     break;
7680                 }
7681             }
7682
7683             if (symbol_context_scope)
7684             {
7685                 SymbolFileTypeSP type_sp(new SymbolFileType(*this, type_uid));
7686
7687                 if (const_value.Form() && type_sp && type_sp->GetType())
7688                     location.CopyOpcodeData(const_value.Unsigned(), type_sp->GetType()->GetByteSize(), dwarf_cu->GetAddressByteSize());
7689
7690                 var_sp.reset (new Variable (MakeUserID(die->GetOffset()),
7691                                             name,
7692                                             mangled,
7693                                             type_sp,
7694                                             scope,
7695                                             symbol_context_scope,
7696                                             &decl,
7697                                             location,
7698                                             is_external,
7699                                             is_artificial));
7700
7701                 var_sp->SetLocationIsConstantValueData (location_is_const_value_data);
7702             }
7703             else
7704             {
7705                 // Not ready to parse this variable yet. It might be a global
7706                 // or static variable that is in a function scope and the function
7707                 // in the symbol context wasn't filled in yet
7708                 return var_sp;
7709             }
7710         }
7711         // Cache var_sp even if NULL (the variable was just a specification or
7712         // was missing vital information to be able to be displayed in the debugger
7713         // (missing location due to optimization, etc)) so we don't re-parse
7714         // this DIE over and over later...
7715         m_die_to_variable_sp[die] = var_sp;
7716     }
7717     return var_sp;
7718 }
7719
7720
7721 const DWARFDebugInfoEntry *
7722 SymbolFileDWARF::FindBlockContainingSpecification (dw_offset_t func_die_offset,
7723                                                    dw_offset_t spec_block_die_offset,
7724                                                    DWARFCompileUnit **result_die_cu_handle)
7725 {
7726     // Give the concrete function die specified by "func_die_offset", find the
7727     // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7728     // to "spec_block_die_offset"
7729     DWARFDebugInfo* info = DebugInfo();
7730
7731     const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint(func_die_offset, result_die_cu_handle);
7732     if (die)
7733     {
7734         assert (*result_die_cu_handle);
7735         return FindBlockContainingSpecification (*result_die_cu_handle, die, spec_block_die_offset, result_die_cu_handle);
7736     }
7737     return NULL;
7738 }
7739
7740
7741 const DWARFDebugInfoEntry *
7742 SymbolFileDWARF::FindBlockContainingSpecification(DWARFCompileUnit* dwarf_cu,
7743                                                   const DWARFDebugInfoEntry *die,
7744                                                   dw_offset_t spec_block_die_offset,
7745                                                   DWARFCompileUnit **result_die_cu_handle)
7746 {
7747     if (die)
7748     {
7749         switch (die->Tag())
7750         {
7751         case DW_TAG_subprogram:
7752         case DW_TAG_inlined_subroutine:
7753         case DW_TAG_lexical_block:
7754             {
7755                 if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_specification, DW_INVALID_OFFSET) == spec_block_die_offset)
7756                 {
7757                     *result_die_cu_handle = dwarf_cu;
7758                     return die;
7759                 }
7760
7761                 if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_abstract_origin, DW_INVALID_OFFSET) == spec_block_die_offset)
7762                 {
7763                     *result_die_cu_handle = dwarf_cu;
7764                     return die;
7765                 }
7766             }
7767             break;
7768         }
7769
7770         // Give the concrete function die specified by "func_die_offset", find the
7771         // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7772         // to "spec_block_die_offset"
7773         for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild(); child_die != NULL; child_die = child_die->GetSibling())
7774         {
7775             const DWARFDebugInfoEntry *result_die = FindBlockContainingSpecification (dwarf_cu,
7776                                                                                       child_die,
7777                                                                                       spec_block_die_offset,
7778                                                                                       result_die_cu_handle);
7779             if (result_die)
7780                 return result_die;
7781         }
7782     }
7783
7784     *result_die_cu_handle = NULL;
7785     return NULL;
7786 }
7787
7788 size_t
7789 SymbolFileDWARF::ParseVariables
7790 (
7791     const SymbolContext& sc,
7792     DWARFCompileUnit* dwarf_cu,
7793     const lldb::addr_t func_low_pc,
7794     const DWARFDebugInfoEntry *orig_die,
7795     bool parse_siblings,
7796     bool parse_children,
7797     VariableList* cc_variable_list
7798 )
7799 {
7800     if (orig_die == NULL)
7801         return 0;
7802
7803     VariableListSP variable_list_sp;
7804
7805     size_t vars_added = 0;
7806     const DWARFDebugInfoEntry *die = orig_die;
7807     while (die != NULL)
7808     {
7809         dw_tag_t tag = die->Tag();
7810
7811         // Check to see if we have already parsed this variable or constant?
7812         if (m_die_to_variable_sp[die])
7813         {
7814             if (cc_variable_list)
7815                 cc_variable_list->AddVariableIfUnique (m_die_to_variable_sp[die]);
7816         }
7817         else
7818         {
7819             // We haven't already parsed it, lets do that now.
7820             if ((tag == DW_TAG_variable) ||
7821                 (tag == DW_TAG_constant) ||
7822                 (tag == DW_TAG_formal_parameter && sc.function))
7823             {
7824                 if (variable_list_sp.get() == NULL)
7825                 {
7826                     const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(orig_die);
7827                     dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7828                     switch (parent_tag)
7829                     {
7830                         case DW_TAG_compile_unit:
7831                             if (sc.comp_unit != NULL)
7832                             {
7833                                 variable_list_sp = sc.comp_unit->GetVariableList(false);
7834                                 if (variable_list_sp.get() == NULL)
7835                                 {
7836                                     variable_list_sp.reset(new VariableList());
7837                                     sc.comp_unit->SetVariableList(variable_list_sp);
7838                                 }
7839                             }
7840                             else
7841                             {
7842                                 GetObjectFile()->GetModule()->ReportError ("parent 0x%8.8" PRIx64 " %s with no valid compile unit in symbol context for 0x%8.8" PRIx64 " %s.\n",
7843                                                                            MakeUserID(sc_parent_die->GetOffset()),
7844                                                                            DW_TAG_value_to_name (parent_tag),
7845                                                                            MakeUserID(orig_die->GetOffset()),
7846                                                                            DW_TAG_value_to_name (orig_die->Tag()));
7847                             }
7848                             break;
7849
7850                         case DW_TAG_subprogram:
7851                         case DW_TAG_inlined_subroutine:
7852                         case DW_TAG_lexical_block:
7853                             if (sc.function != NULL)
7854                             {
7855                                 // Check to see if we already have parsed the variables for the given scope
7856
7857                                 Block *block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7858                                 if (block == NULL)
7859                                 {
7860                                     // This must be a specification or abstract origin with
7861                                     // a concrete block counterpart in the current function. We need
7862                                     // to find the concrete block so we can correctly add the
7863                                     // variable to it
7864                                     DWARFCompileUnit *concrete_block_die_cu = dwarf_cu;
7865                                     const DWARFDebugInfoEntry *concrete_block_die = FindBlockContainingSpecification (sc.function->GetID(),
7866                                                                                                                       sc_parent_die->GetOffset(),
7867                                                                                                                       &concrete_block_die_cu);
7868                                     if (concrete_block_die)
7869                                         block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(concrete_block_die->GetOffset()));
7870                                 }
7871
7872                                 if (block != NULL)
7873                                 {
7874                                     const bool can_create = false;
7875                                     variable_list_sp = block->GetBlockVariableList (can_create);
7876                                     if (variable_list_sp.get() == NULL)
7877                                     {
7878                                         variable_list_sp.reset(new VariableList());
7879                                         block->SetVariableList(variable_list_sp);
7880                                     }
7881                                 }
7882                             }
7883                             break;
7884
7885                         default:
7886                              GetObjectFile()->GetModule()->ReportError ("didn't find appropriate parent DIE for variable list for 0x%8.8" PRIx64 " %s.\n",
7887                                                                         MakeUserID(orig_die->GetOffset()),
7888                                                                         DW_TAG_value_to_name (orig_die->Tag()));
7889                             break;
7890                     }
7891                 }
7892
7893                 if (variable_list_sp)
7894                 {
7895                     VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, func_low_pc));
7896                     if (var_sp)
7897                     {
7898                         variable_list_sp->AddVariableIfUnique (var_sp);
7899                         if (cc_variable_list)
7900                             cc_variable_list->AddVariableIfUnique (var_sp);
7901                         ++vars_added;
7902                     }
7903                 }
7904             }
7905         }
7906
7907         bool skip_children = (sc.function == NULL && tag == DW_TAG_subprogram);
7908
7909         if (!skip_children && parse_children && die->HasChildren())
7910         {
7911             vars_added += ParseVariables(sc, dwarf_cu, func_low_pc, die->GetFirstChild(), true, true, cc_variable_list);
7912         }
7913
7914         if (parse_siblings)
7915             die = die->GetSibling();
7916         else
7917             die = NULL;
7918     }
7919     return vars_added;
7920 }
7921
7922 //------------------------------------------------------------------
7923 // PluginInterface protocol
7924 //------------------------------------------------------------------
7925 ConstString
7926 SymbolFileDWARF::GetPluginName()
7927 {
7928     return GetPluginNameStatic();
7929 }
7930
7931 uint32_t
7932 SymbolFileDWARF::GetPluginVersion()
7933 {
7934     return 1;
7935 }
7936
7937 void
7938 SymbolFileDWARF::CompleteTagDecl (void *baton, clang::TagDecl *decl)
7939 {
7940     SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7941     ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7942     if (clang_type)
7943         symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7944 }
7945
7946 void
7947 SymbolFileDWARF::CompleteObjCInterfaceDecl (void *baton, clang::ObjCInterfaceDecl *decl)
7948 {
7949     SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7950     ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7951     if (clang_type)
7952         symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7953 }
7954
7955 void
7956 SymbolFileDWARF::DumpIndexes ()
7957 {
7958     StreamFile s(stdout, false);
7959
7960     s.Printf ("DWARF index for (%s) '%s':",
7961               GetObjectFile()->GetModule()->GetArchitecture().GetArchitectureName(),
7962               GetObjectFile()->GetFileSpec().GetPath().c_str());
7963     s.Printf("\nFunction basenames:\n");    m_function_basename_index.Dump (&s);
7964     s.Printf("\nFunction fullnames:\n");    m_function_fullname_index.Dump (&s);
7965     s.Printf("\nFunction methods:\n");      m_function_method_index.Dump (&s);
7966     s.Printf("\nFunction selectors:\n");    m_function_selector_index.Dump (&s);
7967     s.Printf("\nObjective C class selectors:\n");    m_objc_class_selectors_index.Dump (&s);
7968     s.Printf("\nGlobals and statics:\n");   m_global_index.Dump (&s);
7969     s.Printf("\nTypes:\n");                 m_type_index.Dump (&s);
7970     s.Printf("\nNamepaces:\n");             m_namespace_index.Dump (&s);
7971 }
7972
7973 void
7974 SymbolFileDWARF::SearchDeclContext (const clang::DeclContext *decl_context,
7975                                     const char *name,
7976                                     llvm::SmallVectorImpl <clang::NamedDecl *> *results)
7977 {
7978     DeclContextToDIEMap::iterator iter = m_decl_ctx_to_die.find(decl_context);
7979
7980     if (iter == m_decl_ctx_to_die.end())
7981         return;
7982
7983     for (DIEPointerSet::iterator pos = iter->second.begin(), end = iter->second.end(); pos != end; ++pos)
7984     {
7985         const DWARFDebugInfoEntry *context_die = *pos;
7986
7987         if (!results)
7988             return;
7989
7990         DWARFDebugInfo* info = DebugInfo();
7991
7992         DIEArray die_offsets;
7993
7994         DWARFCompileUnit* dwarf_cu = NULL;
7995         const DWARFDebugInfoEntry* die = NULL;
7996
7997         if (m_using_apple_tables)
7998         {
7999             if (m_apple_types_ap.get())
8000                 m_apple_types_ap->FindByName (name, die_offsets);
8001         }
8002         else
8003         {
8004             if (!m_indexed)
8005                 Index ();
8006
8007             m_type_index.Find (ConstString(name), die_offsets);
8008         }
8009
8010         const size_t num_matches = die_offsets.size();
8011
8012         if (num_matches)
8013         {
8014             for (size_t i = 0; i < num_matches; ++i)
8015             {
8016                 const dw_offset_t die_offset = die_offsets[i];
8017                 die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
8018
8019                 if (die->GetParent() != context_die)
8020                     continue;
8021
8022                 Type *matching_type = ResolveType (dwarf_cu, die);
8023
8024                 clang::QualType qual_type = matching_type->GetClangForwardType().GetQualType();
8025
8026                 if (const clang::TagType *tag_type = llvm::dyn_cast<clang::TagType>(qual_type.getTypePtr()))
8027                 {
8028                     clang::TagDecl *tag_decl = tag_type->getDecl();
8029                     results->push_back(tag_decl);
8030                 }
8031                 else if (const clang::TypedefType *typedef_type = llvm::dyn_cast<clang::TypedefType>(qual_type.getTypePtr()))
8032                 {
8033                     clang::TypedefNameDecl *typedef_decl = typedef_type->getDecl();
8034                     results->push_back(typedef_decl);
8035                 }
8036             }
8037         }
8038     }
8039 }
8040
8041 void
8042 SymbolFileDWARF::FindExternalVisibleDeclsByName (void *baton,
8043                                                  const clang::DeclContext *decl_context,
8044                                                  clang::DeclarationName decl_name,
8045                                                  llvm::SmallVectorImpl <clang::NamedDecl *> *results)
8046 {
8047
8048     switch (decl_context->getDeclKind())
8049     {
8050     case clang::Decl::Namespace:
8051     case clang::Decl::TranslationUnit:
8052         {
8053             SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
8054             symbol_file_dwarf->SearchDeclContext (decl_context, decl_name.getAsString().c_str(), results);
8055         }
8056         break;
8057     default:
8058         break;
8059     }
8060 }
8061
8062 bool
8063 SymbolFileDWARF::LayoutRecordType(void *baton, const clang::RecordDecl *record_decl, uint64_t &size,
8064                                   uint64_t &alignment,
8065                                   llvm::DenseMap<const clang::FieldDecl *, uint64_t> &field_offsets,
8066                                   llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
8067                                   llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
8068 {
8069     SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
8070     return symbol_file_dwarf->LayoutRecordType (record_decl, size, alignment, field_offsets, base_offsets, vbase_offsets);
8071 }
8072
8073 bool
8074 SymbolFileDWARF::LayoutRecordType(const clang::RecordDecl *record_decl, uint64_t &bit_size, uint64_t &alignment,
8075                                   llvm::DenseMap<const clang::FieldDecl *, uint64_t> &field_offsets,
8076                                   llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
8077                                   llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
8078 {
8079     Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
8080     RecordDeclToLayoutMap::iterator pos = m_record_decl_to_layout_map.find (record_decl);
8081     bool success = false;
8082     base_offsets.clear();
8083     vbase_offsets.clear();
8084     if (pos != m_record_decl_to_layout_map.end())
8085     {
8086         bit_size = pos->second.bit_size;
8087         alignment = pos->second.alignment;
8088         field_offsets.swap(pos->second.field_offsets);
8089         base_offsets.swap (pos->second.base_offsets);
8090         vbase_offsets.swap (pos->second.vbase_offsets);
8091         m_record_decl_to_layout_map.erase(pos);
8092         success = true;
8093     }
8094     else
8095     {
8096         bit_size = 0;
8097         alignment = 0;
8098         field_offsets.clear();
8099     }
8100
8101     if (log)
8102         GetObjectFile()->GetModule()->LogMessage (log,
8103                                                   "SymbolFileDWARF::LayoutRecordType (record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u],base_offsets[%u], vbase_offsets[%u]) success = %i",
8104                                                   static_cast<const void*>(record_decl),
8105                                                   bit_size, alignment,
8106                                                   static_cast<uint32_t>(field_offsets.size()),
8107                                                   static_cast<uint32_t>(base_offsets.size()),
8108                                                   static_cast<uint32_t>(vbase_offsets.size()),
8109                                                   success);
8110     return success;
8111 }
8112
8113
8114 SymbolFileDWARFDebugMap *
8115 SymbolFileDWARF::GetDebugMapSymfile ()
8116 {
8117     if (m_debug_map_symfile == NULL && !m_debug_map_module_wp.expired())
8118     {
8119         lldb::ModuleSP module_sp (m_debug_map_module_wp.lock());
8120         if (module_sp)
8121         {
8122             SymbolVendor *sym_vendor = module_sp->GetSymbolVendor();
8123             if (sym_vendor)
8124                 m_debug_map_symfile = (SymbolFileDWARFDebugMap *)sym_vendor->GetSymbolFile();
8125         }
8126     }
8127     return m_debug_map_symfile;
8128 }
8129
8130